diff options
| author | tjr <tjr@FreeBSD.org> | 2004-06-30 23:43:39 +0000 |
|---|---|---|
| committer | tjr <tjr@FreeBSD.org> | 2004-06-30 23:43:39 +0000 |
| commit | 6ea5314b57928a6385cf31fb23a37d5b50104805 (patch) | |
| tree | e1b614887a52d2d107f4419b3a888bbdc23c35c0 /lib/libz | |
| parent | ee8875d5fa80735b0e7d1b94dae73766ebd08a0a (diff) | |
| parent | 439ed8d847d36d5ac47ec0209b6b106c00198268 (diff) | |
| download | FreeBSD-src-6ea5314b57928a6385cf31fb23a37d5b50104805.zip FreeBSD-src-6ea5314b57928a6385cf31fb23a37d5b50104805.tar.gz | |
This commit was generated by cvs2svn to compensate for changes in r131377,
which included commits to RCS files with non-trunk default branches.
Diffstat (limited to 'lib/libz')
| -rw-r--r-- | lib/libz/ChangeLog | 255 | ||||
| -rw-r--r-- | lib/libz/FAQ | 247 | ||||
| -rw-r--r-- | lib/libz/README | 137 | ||||
| -rw-r--r-- | lib/libz/algorithm.txt | 106 | ||||
| -rw-r--r-- | lib/libz/crc32.h | 441 | ||||
| -rw-r--r-- | lib/libz/infback.c | 619 | ||||
| -rw-r--r-- | lib/libz/inffast.h | 12 | ||||
| -rw-r--r-- | lib/libz/inffixed.h | 241 | ||||
| -rw-r--r-- | lib/libz/inflate.h | 117 | ||||
| -rw-r--r-- | lib/libz/inftrees.h | 91 | ||||
| -rw-r--r-- | lib/libz/zlib.h | 465 |
11 files changed, 2290 insertions, 441 deletions
diff --git a/lib/libz/ChangeLog b/lib/libz/ChangeLog index bf2e3f9..48e465f 100644 --- a/lib/libz/ChangeLog +++ b/lib/libz/ChangeLog @@ -1,5 +1,246 @@ - ChangeLog file for zlib + ChangeLog file for zlib + +Changes in 1.2.1 (17 November 2003) +- Remove a tab in contrib/gzappend/gzappend.c +- Update some interfaces in contrib for new zlib functions +- Update zlib version number in some contrib entries +- Add Windows CE definition for ptrdiff_t in zutil.h [Mai, Truta] +- Support shared libraries on Hurd and KFreeBSD [Brown] +- Fix error in NO_DIVIDE option of adler32.c + +Changes in 1.2.0.8 (4 November 2003) +- Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas +- Add experimental NO_DIVIDE #define in adler32.c + - Possibly faster on some processors (let me know if it is) +- Correct Z_BLOCK to not return on first inflate call if no wrap +- Fix strm->data_type on inflate() return to correctly indicate EOB +- Add deflatePrime() function for appending in the middle of a byte +- Add contrib/gzappend for an example of appending to a stream +- Update win32/DLL_FAQ.txt [Truta] +- Delete Turbo C comment in README [Truta] +- Improve some indentation in zconf.h [Truta] +- Fix infinite loop on bad input in configure script [Church] +- Fix gzeof() for concatenated gzip files [Johnson] +- Add example to contrib/visual-basic.txt [Michael B.] +- Add -p to mkdir's in Makefile.in [vda] +- Fix configure to properly detect presence or lack of printf functions +- Add AS400 support [Monnerat] +- Add a little Cygwin support [Wilson] + +Changes in 1.2.0.7 (21 September 2003) +- Correct some debug formats in contrib/infback9 +- Cast a type in a debug statement in trees.c +- Change search and replace delimiter in configure from % to # [Beebe] +- Update contrib/untgz to 0.2 with various fixes [Truta] +- Add build support for Amiga [Nikl] +- Remove some directories in old that have been updated to 1.2 +- Add dylib building for Mac OS X in configure and Makefile.in +- Remove old distribution stuff from Makefile +- Update README to point to DLL_FAQ.txt, and add comment on Mac OS X +- Update links in README + +Changes in 1.2.0.6 (13 September 2003) +- Minor FAQ updates +- Update contrib/minizip to 1.00 [Vollant] +- Remove test of gz functions in example.c when GZ_COMPRESS defined [Truta] +- Update POSTINC comment for 68060 [Nikl] +- Add contrib/infback9 with deflate64 decoding (unsupported) +- For MVS define NO_vsnprintf and undefine FAR [van Burik] +- Add pragma for fdopen on MVS [van Burik] + +Changes in 1.2.0.5 (8 September 2003) +- Add OF to inflateBackEnd() declaration in zlib.h +- Remember start when using gzdopen in the middle of a file +- Use internal off_t counters in gz* functions to properly handle seeks +- Perform more rigorous check for distance-too-far in inffast.c +- Add Z_BLOCK flush option to return from inflate at block boundary +- Set strm->data_type on return from inflate + - Indicate bits unused, if at block boundary, and if in last block +- Replace size_t with ptrdiff_t in crc32.c, and check for correct size +- Add condition so old NO_DEFLATE define still works for compatibility +- FAQ update regarding the Windows DLL [Truta] +- INDEX update: add qnx entry, remove aix entry [Truta] +- Install zlib.3 into mandir [Wilson] +- Move contrib/zlib_dll_FAQ.txt to win32/DLL_FAQ.txt; update [Truta] +- Adapt the zlib interface to the new DLL convention guidelines [Truta] +- Introduce ZLIB_WINAPI macro to allow the export of functions using + the WINAPI calling convention, for Visual Basic [Vollant, Truta] +- Update msdos and win32 scripts and makefiles [Truta] +- Export symbols by name, not by ordinal, in win32/zlib.def [Truta] +- Add contrib/ada [Anisimkov] +- Move asm files from contrib/vstudio/vc70_32 to contrib/asm386 [Truta] +- Rename contrib/asm386 to contrib/masmx86 [Truta, Vollant] +- Add contrib/masm686 [Truta] +- Fix offsets in contrib/inflate86 and contrib/masmx86/inffas32.asm + [Truta, Vollant] +- Update contrib/delphi; rename to contrib/pascal; add example [Truta] +- Remove contrib/delphi2; add a new contrib/delphi [Truta] +- Avoid inclusion of the nonstandard <memory.h> in contrib/iostream, + and fix some method prototypes [Truta] +- Fix the ZCR_SEED2 constant to avoid warnings in contrib/minizip + [Truta] +- Avoid the use of backslash (\) in contrib/minizip [Vollant] +- Fix file time handling in contrib/untgz; update makefiles [Truta] +- Update contrib/vstudio/vc70_32 to comply with the new DLL guidelines + [Vollant] +- Remove contrib/vstudio/vc15_16 [Vollant] +- Rename contrib/vstudio/vc70_32 to contrib/vstudio/vc7 [Truta] +- Update README.contrib [Truta] +- Invert the assignment order of match_head and s->prev[...] in + INSERT_STRING [Truta] +- Compare TOO_FAR with 32767 instead of 32768, to avoid 16-bit warnings + [Truta] +- Compare function pointers with 0, not with NULL or Z_NULL [Truta] +- Fix prototype of syncsearch in inflate.c [Truta] +- Introduce ASMINF macro to be enabled when using an ASM implementation + of inflate_fast [Truta] +- Change NO_DEFLATE to NO_GZCOMPRESS [Truta] +- Modify test_gzio in example.c to take a single file name as a + parameter [Truta] +- Exit the example.c program if gzopen fails [Truta] +- Add type casts around strlen in example.c [Truta] +- Remove casting to sizeof in minigzip.c; give a proper type + to the variable compared with SUFFIX_LEN [Truta] +- Update definitions of STDC and STDC99 in zconf.h [Truta] +- Synchronize zconf.h with the new Windows DLL interface [Truta] +- Use SYS16BIT instead of __32BIT__ to distinguish between + 16- and 32-bit platforms [Truta] +- Use far memory allocators in small 16-bit memory models for + Turbo C [Truta] +- Add info about the use of ASMV, ASMINF and ZLIB_WINAPI in + zlibCompileFlags [Truta] +- Cygwin has vsnprintf [Wilson] +- In Windows16, OS_CODE is 0, as in MSDOS [Truta] +- In Cygwin, OS_CODE is 3 (Unix), not 11 (Windows32) [Wilson] + +Changes in 1.2.0.4 (10 August 2003) +- Minor FAQ updates +- Be more strict when checking inflateInit2's windowBits parameter +- Change NO_GUNZIP compile option to NO_GZIP to cover deflate as well +- Add gzip wrapper option to deflateInit2 using windowBits +- Add updated QNX rule in configure and qnx directory [Bonnefoy] +- Make inflate distance-too-far checks more rigorous +- Clean up FAR usage in inflate +- Add casting to sizeof() in gzio.c and minigzip.c + +Changes in 1.2.0.3 (19 July 2003) +- Fix silly error in gzungetc() implementation [Vollant] +- Update contrib/minizip and contrib/vstudio [Vollant] +- Fix printf format in example.c +- Correct cdecl support in zconf.in.h [Anisimkov] +- Minor FAQ updates + +Changes in 1.2.0.2 (13 July 2003) +- Add ZLIB_VERNUM in zlib.h for numerical preprocessor comparisons +- Attempt to avoid warnings in crc32.c for pointer-int conversion +- Add AIX to configure, remove aix directory [Bakker] +- Add some casts to minigzip.c +- Improve checking after insecure sprintf() or vsprintf() calls +- Remove #elif's from crc32.c +- Change leave label to inf_leave in inflate.c and infback.c to avoid + library conflicts +- Remove inflate gzip decoding by default--only enable gzip decoding by + special request for stricter backward compatibility +- Add zlibCompileFlags() function to return compilation information +- More typecasting in deflate.c to avoid warnings +- Remove leading underscore from _Capital #defines [Truta] +- Fix configure to link shared library when testing +- Add some Windows CE target adjustments [Mai] +- Remove #define ZLIB_DLL in zconf.h [Vollant] +- Add zlib.3 [Rodgers] +- Update RFC URL in deflate.c and algorithm.txt [Mai] +- Add zlib_dll_FAQ.txt to contrib [Truta] +- Add UL to some constants [Truta] +- Update minizip and vstudio [Vollant] +- Remove vestigial NEED_DUMMY_RETURN from zconf.in.h +- Expand use of NO_DUMMY_DECL to avoid all dummy structures +- Added iostream3 to contrib [Schwardt] +- Replace rewind() with fseek() for WinCE [Truta] +- Improve setting of zlib format compression level flags + - Report 0 for huffman and rle strategies and for level == 0 or 1 + - Report 2 only for level == 6 +- Only deal with 64K limit when necessary at compile time [Truta] +- Allow TOO_FAR check to be turned off at compile time [Truta] +- Add gzclearerr() function [Souza] +- Add gzungetc() function + +Changes in 1.2.0.1 (17 March 2003) +- Add Z_RLE strategy for run-length encoding [Truta] + - When Z_RLE requested, restrict matches to distance one + - Update zlib.h, minigzip.c, gzopen(), gzdopen() for Z_RLE +- Correct FASTEST compilation to allow level == 0 +- Clean up what gets compiled for FASTEST +- Incorporate changes to zconf.in.h [Vollant] + - Refine detection of Turbo C need for dummy returns + - Refine ZLIB_DLL compilation + - Include additional header file on VMS for off_t typedef +- Try to use _vsnprintf where it supplants vsprintf [Vollant] +- Add some casts in inffast.c +- Enchance comments in zlib.h on what happens if gzprintf() tries to + write more than 4095 bytes before compression +- Remove unused state from inflateBackEnd() +- Remove exit(0) from minigzip.c, example.c +- Get rid of all those darn tabs +- Add "check" target to Makefile.in that does the same thing as "test" +- Add "mostlyclean" and "maintainer-clean" targets to Makefile.in +- Update contrib/inflate86 [Anderson] +- Update contrib/testzlib, contrib/vstudio, contrib/minizip [Vollant] +- Add msdos and win32 directories with makefiles [Truta] +- More additions and improvements to the FAQ + +Changes in 1.2.0 (9 March 2003) +- New and improved inflate code + - About 20% faster + - Does not allocate 32K window unless and until needed + - Automatically detects and decompresses gzip streams + - Raw inflate no longer needs an extra dummy byte at end + - Added inflateBack functions using a callback interface--even faster + than inflate, useful for file utilities (gzip, zip) + - Added inflateCopy() function to record state for random access on + externally generated deflate streams (e.g. in gzip files) + - More readable code (I hope) +- New and improved crc32() + - About 50% faster, thanks to suggestions from Rodney Brown +- Add deflateBound() and compressBound() functions +- Fix memory leak in deflateInit2() +- Permit setting dictionary for raw deflate (for parallel deflate) +- Fix const declaration for gzwrite() +- Check for some malloc() failures in gzio.c +- Fix bug in gzopen() on single-byte file 0x1f +- Fix bug in gzread() on concatenated file with 0x1f at end of buffer + and next buffer doesn't start with 0x8b +- Fix uncompress() to return Z_DATA_ERROR on truncated input +- Free memory at end of example.c +- Remove MAX #define in trees.c (conflicted with some libraries) +- Fix static const's in deflate.c, gzio.c, and zutil.[ch] +- Declare malloc() and free() in gzio.c if STDC not defined +- Use malloc() instead of calloc() in zutil.c if int big enough +- Define STDC for AIX +- Add aix/ with approach for compiling shared library on AIX +- Add HP-UX support for shared libraries in configure +- Add OpenUNIX support for shared libraries in configure +- Use $cc instead of gcc to build shared library +- Make prefix directory if needed when installing +- Correct Macintosh avoidance of typedef Byte in zconf.h +- Correct Turbo C memory allocation when under Linux +- Use libz.a instead of -lz in Makefile (assure use of compiled library) +- Update configure to check for snprintf or vsnprintf functions and their + return value, warn during make if using an insecure function +- Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that + is lost when library is used--resolution is to build new zconf.h +- Documentation improvements (in zlib.h): + - Document raw deflate and inflate + - Update RFCs URL + - Point out that zlib and gzip formats are different + - Note that Z_BUF_ERROR is not fatal + - Document string limit for gzprintf() and possible buffer overflow + - Note requirement on avail_out when flushing + - Note permitted values of flush parameter of inflate() +- Add some FAQs (and even answers) to the FAQ +- Add contrib/inflate86/ for x86 faster inflate +- Add contrib/blast/ for PKWare Data Compression Library decompression +- Add contrib/puff/ simple inflate for deflate format description Changes in 1.1.4 (11 March 2002) - ZFREE was repeated on same allocation on some error conditions. @@ -10,7 +251,7 @@ Changes in 1.1.4 (11 March 2002) less than 32K. - force windowBits > 8 to avoid a bug in the encoder for a window size of 256 bytes. (A complete fix will be available in 1.1.5). - + Changes in 1.1.3 (9 July 1998) - fix "an inflate input buffer bug that shows up on rare but persistent occasions" (Mark) @@ -184,13 +425,13 @@ Changes in 1.0.6 (19 Jan 1998) - added Makefile.nt (thanks to Stephen Williams) - added the unsupported "contrib" directory: contrib/asm386/ by Gilles Vollant <info@winimage.com> - 386 asm code replacing longest_match(). + 386 asm code replacing longest_match(). contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu> A C++ I/O streams interface to the zlib gz* functions contrib/iostream2/ by Tyge Løvset <Tyge.Lovset@cmr.no> - Another C++ I/O streams interface + Another C++ I/O streams interface contrib/untgz/ by "Pedro A. Aranda Guti\irrez" <paag@tid.es> - A very simple tar.gz file extractor using zlib + A very simple tar.gz file extractor using zlib contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl> How to use compress(), uncompress() and the gz* functions from VB. - pass params -f (filtered data), -h (huffman only), -1 to -9 (compression @@ -217,7 +458,7 @@ Changes in 1.0.6 (19 Jan 1998) - add NEED_DUMMY_RETURN for Borland - use variable z_verbose for tracing in debug mode (L. Peter Deutsch). - allow compilation with CC -- defined STDC for OS/2 (David Charlap) +- defined STDC for OS/2 (David Charlap) - limit external names to 8 chars for MVS (Thomas Lund) - in minigzip.c, use static buffers only for 16-bit systems - fix suffix check for "minigzip -d foo.gz" @@ -242,7 +483,7 @@ Changes in 1.0.5 (3 Jan 98) - Eliminate memory leaks on error conditions in inflate - Removed some vestigial code in inflate - Update web address in README - + Changes in 1.0.4 (24 Jul 96) - In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF bit, so the decompressor could decompress all the correct data but went diff --git a/lib/libz/FAQ b/lib/libz/FAQ index 47a7d60..7115ec3 100644 --- a/lib/libz/FAQ +++ b/lib/libz/FAQ @@ -1,8 +1,8 @@ - Frequently Asked Questions about zlib + Frequently Asked Questions about zlib -If your question is not there, please check the zlib home page +If your question is not there, please check the zlib home page http://www.zlib.org which may have more recent information. The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html @@ -13,14 +13,15 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html 2. Where can I get a Windows DLL version? - The zlib sources can be compiled without change to produce a DLL. If you - want a precompiled DLL, see http://www.winimage.com/zLibDll/ . Questions - about the zlib DLL should be sent to Gilles Vollant (info@winimage.com). + The zlib sources can be compiled without change to produce a DLL. + See the file win32/DLL_FAQ.txt in the zlib distribution. + Pointers to the precompiled DLL are found in the zlib web site at + http://www.zlib.org. 3. Where can I get a Visual Basic interface to zlib? See - * http://www.winimage.com/zLibDll/cmp-z-it.zip + * http://www.winimage.com/zLibDll/ * http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm * contrib/visual-basic.txt in the zlib distribution @@ -36,6 +37,11 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html Before making the call, make sure that avail_in and avail_out are not zero. When setting the parameter flush equal to Z_FINISH, also make sure that avail_out is big enough to allow processing all pending input. + Note that a Z_BUF_ERROR is not fatal--another call to deflate() or + inflate() can be made with more input or output space. A Z_BUF_ERROR + may in fact be unavoidable depending on how the functions are used, since + it is not possible to tell whether or not there is more output pending + when strm.avail_out returns with zero. 6. Where's the zlib documentation (man pages, etc.)? @@ -61,14 +67,13 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html If "make test" produces something like example.o(.text+0x154): undefined reference to `gzputc' - + check that you don't have old files libz.* in /usr/lib, /usr/local/lib or /usr/X11R6/lib. Remove any old versions, then do "make install". 10. I need a Delphi interface to zlib. - See the directories contrib/delphi and contrib/delphi2 in the zlib - distribution. + See the contrib/delphi directory in the zlib distribution. 11. Can zlib handle .zip archives? @@ -85,16 +90,226 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html ./configure -s make -14. Why does "make test" fail on Mac OS X? +14. How do I install a shared zlib library on Unix? + + make install - Mac OS X already includes zlib as a shared library, and so -lz links the - shared library instead of the one that the "make" compiled. For zlib - 1.1.3, the two are incompatible due to different compile-time - options. Simply change the -lz in the Makefile to libz.a, and it will use - the compiled library instead of the shared one and the "make test" will - succeed. + However, many flavors of Unix come with a shared zlib already installed. + Before going to the trouble of compiling a shared version of zlib and + trying to install it, you may want to check if it's already there! If you + can #include <zlib.h>, it's there. The -lz option will probably link to it. 15. I have a question about OttoPDF We are not the authors of OttoPDF. The real author is on the OttoPDF web site Joel Hainley jhainley@myndkryme.com. + +16. Why does gzip give an error on a file I make with compress/deflate? + + The compress and deflate functions produce data in the zlib format, which + is different and incompatible with the gzip format. The gz* functions in + zlib on the other hand use the gzip format. Both the zlib and gzip + formats use the same compressed data format internally, but have different + headers and trailers around the compressed data. + +17. Ok, so why are there two different formats? + + The gzip format was designed to retain the directory information about + a single file, such as the name and last modification date. The zlib + format on the other hand was designed for in-memory and communication + channel applications, and has a much more compact header and trailer and + uses a faster integrity check than gzip. + +18. Well that's nice, but how do I make a gzip file in memory? + + You can request that deflate write the gzip format instead of the zlib + format using deflateInit2(). You can also request that inflate decode + the gzip format using inflateInit2(). Read zlib.h for more details. + + Note that you cannot specify special gzip header contents (e.g. a file + name or modification date), nor will inflate tell you what was in the + gzip header. If you need to customize the header or see what's in it, + you can use the raw deflate and inflate operations and the crc32() + function and roll your own gzip encoding and decoding. Read the gzip + RFC 1952 for details of the header and trailer format. + +19. Is zlib thread-safe? + + Yes. However any library routines that zlib uses and any application- + provided memory allocation routines must also be thread-safe. zlib's gz* + functions use stdio library routines, and most of zlib's functions use the + library memory allocation routines by default. zlib's Init functions allow + for the application to provide custom memory allocation routines. + + Of course, you should only operate on any given zlib or gzip stream from a + single thread at a time. + +20. Can I use zlib in my commercial application? + + Yes. Please read the license in zlib.h. + +21. Is zlib under the GNU license? + + No. Please read the license in zlib.h. + +22. The license says that altered source versions must be "plainly marked". So + what exactly do I need to do to meet that requirement? + + You need to change the ZLIB_VERSION and ZLIB_VERNUM #defines in zlib.h. In + particular, the final version number needs to be changed to "f", and an + identification string should be appended to ZLIB_VERSION. Version numbers + x.x.x.f are reserved for modifications to zlib by others than the zlib + maintainers. For example, if the version of the base zlib you are altering + is "1.2.3.4", then in zlib.h you should change ZLIB_VERNUM to 0x123f, and + ZLIB_VERSION to something like "1.2.3.f-zachary-mods-v3". You can also + update the version strings in deflate.c and inftrees.c. + + For altered source distributions, you should also note the origin and + nature of the changes in zlib.h, as well as in ChangeLog and README, along + with the dates of the alterations. The origin should include at least your + name (or your company's name), and an email address to contact for help or + issues with the library. + + Note that distributing a compiled zlib library along with zlib.h and + zconf.h is also a source distribution, and so you should change + ZLIB_VERSION and ZLIB_VERNUM and note the origin and nature of the changes + in zlib.h as you would for a full source distribution. + +23. Will zlib work on a big-endian or little-endian architecture, and can I + exchange compressed data between them? + + Yes and yes. + +24. Will zlib work on a 64-bit machine? + + It should. It has been tested on 64-bit machines, and has no dependence + on any data types being limited to 32-bits in length. If you have any + difficulties, please provide a complete problem report to zlib@gzip.org + +25. Will zlib decompress data from the PKWare Data Compression Library? + + No. The PKWare DCL uses a completely different compressed data format + than does PKZIP and zlib. However, you can look in zlib's contrib/blast + directory for a possible solution to your problem. + +26. Can I access data randomly in a compressed stream? + + No, not without some preparation. If when compressing you periodically + use Z_FULL_FLUSH, carefully write all the pending data at those points, + and keep an index of those locations, then you can start decompression + at those points. You have to be careful to not use Z_FULL_FLUSH too + often, since it can significantly degrade compression. + +27. Does zlib work on MVS, OS/390, CICS, etc.? + + We don't know for sure. We have heard occasional reports of success on + these systems. If you do use it on one of these, please provide us with + a report, instructions, and patches that we can reference when we get + these questions. Thanks. + +28. Is there some simpler, easier to read version of inflate I can look at + to understand the deflate format? + + First off, you should read RFC 1951. Second, yes. Look in zlib's + contrib/puff directory. + +29. Does zlib infringe on any patents? + + As far as we know, no. In fact, that was originally the whole point behind + zlib. Look here for some more information: + + http://www.gzip.org/#faq11 + +30. Can zlib work with greater than 4 GB of data? + + Yes. inflate() and deflate() will process any amount of data correctly. + Each call of inflate() or deflate() is limited to input and output chunks + of the maximum value that can be stored in the compiler's "unsigned int" + type, but there is no limit to the number of chunks. Note however that the + strm.total_in and strm_total_out counters may be limited to 4 GB. These + counters are provided as a convenience and are not used internally by + inflate() or deflate(). The application can easily set up its own counters + updated after each call of inflate() or deflate() to count beyond 4 GB. + compress() and uncompress() may be limited to 4 GB, since they operate in a + single call. gzseek() and gztell() may be limited to 4 GB depending on how + zlib is compiled. See the zlibCompileFlags() function in zlib.h. + + The word "may" appears several times above since there is a 4 GB limit + only if the compiler's "long" type is 32 bits. If the compiler's "long" + type is 64 bits, then the limit is 16 exabytes. + +31. Does zlib have any security vulnerabilities? + + The only one that we are aware of is potentially in gzprintf(). If zlib + is compiled to use sprintf() or vsprintf(), then there is no protection + against a buffer overflow of a 4K string space, other than the caller of + gzprintf() assuring that the output will not exceed 4K. On the other + hand, if zlib is compiled to use snprintf() or vsnprintf(), which should + normally be the case, then there is no vulnerability. The ./configure + script will display warnings if an insecure variation of sprintf() will + be used by gzprintf(). Also the zlibCompileFlags() function will return + information on what variant of sprintf() is used by gzprintf(). + + If you don't have snprintf() or vsnprintf() and would like one, you can + find a portable implementation here: + + http://www.ijs.si/software/snprintf/ + + Note that you should be using the most recent version of zlib. Versions + 1.1.3 and before were subject to a double-free vulnerability. + +32. Is there a Java version of zlib? + + Probably what you want is to use zlib in Java. zlib is already included + as part of the Java SDK in the java.util.zip package. If you really want + a version of zlib written in the Java language, look on the zlib home + page for links: http://www.zlib.org/ + +33. I get this or that compiler or source-code scanner warning when I crank it + up to maximally-pendantic. Can't you guys write proper code? + + Many years ago, we gave up attempting to avoid warnings on every compiler + in the universe. It just got to be a waste of time, and some compilers + were downright silly. So now, we simply make sure that the code always + works. + +34. Will zlib read the (insert any ancient or arcane format here) compressed + data format? + + Probably not. Look in the comp.compression FAQ for pointers to various + formats and associated software. + +35. How can I encrypt/decrypt zip files with zlib? + + zlib doesn't support encryption. The original PKZIP encryption is very weak + and can be broken with freely available programs. To get strong encryption, + use gpg ( http://www.gnupg.org/ ) which already includes zlib compression. + For PKZIP compatible "encryption", look at http://www.info-zip.org/ + +36. What's the difference between the "gzip" and "deflate" HTTP 1.1 encodings? + + "gzip" is the gzip format, and "deflate" is the zlib format. They should + probably have called the second one "zlib" instead to avoid confusion + with the raw deflate compressed data format. While the HTTP 1.1 RFC 2616 + correctly points to the zlib specification in RFC 1950 for the "deflate" + transfer encoding, there have been reports of servers and browsers that + incorrectly produce or expect raw deflate data per the deflate + specficiation in RFC 1951, most notably Microsoft. So even though the + "deflate" transfer encoding using the zlib format would be the more + efficient approach (and in fact exactly what the zlib format was designed + for), using the "gzip" transfer encoding is probably more reliable due to + an unfortunate choice of name on the part of the HTTP 1.1 authors. + + Bottom line: use the gzip format for HTTP 1.1 encoding. + +37. Does zlib support the new "Deflate64" format introduced by PKWare? + + No. PKWare has apparently decided to keep that format proprietary, since + they have not documented it as they have previous compression formats. + In any case, the compression improvements are so modest compared to other + more modern approaches, that it's not worth the effort to implement. + +38. Can you please sign these lengthy legal documents and fax them back to us + so that we can use your software in our product? + + No. Go away. Shoo. diff --git a/lib/libz/README b/lib/libz/README index 29d6714..0f12054 100644 --- a/lib/libz/README +++ b/lib/libz/README @@ -1,110 +1,87 @@ -zlib 1.1.4 is a general purpose data compression library. All the code -is thread safe. The data format used by the zlib library -is described by RFCs (Request for Comments) 1950 to 1952 in the files -http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate -format) and rfc1952.txt (gzip format). These documents are also available in -other formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html +ZLIB DATA COMPRESSION LIBRARY + +zlib 1.2.1 is a general purpose data compression library. All the code is +thread safe. The data format used by the zlib library is described by RFCs +(Request for Comments) 1950 to 1952 in the files +http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format) +and rfc1952.txt (gzip format). These documents are also available in other +formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html All functions of the compression library are documented in the file zlib.h -(volunteer to write man pages welcome, contact jloup@gzip.org). A usage -example of the library is given in the file example.c which also tests that -the library is working correctly. Another example is given in the file -minigzip.c. The compression library itself is composed of all source files -except example.c and minigzip.c. - -To compile all files and run the test program, follow the instructions -given at the top of Makefile. In short "make test; make install" -should work for most machines. For Unix: "./configure; make test; make install" -For MSDOS, use one of the special makefiles such as Makefile.msc. -For VMS, use Make_vms.com or descrip.mms. - -Questions about zlib should be sent to <zlib@gzip.org>, or to -Gilles Vollant <info@winimage.com> for the Windows DLL version. -The zlib home page is http://www.zlib.org or http://www.gzip.org/zlib/ -Before reporting a problem, please check this site to verify that -you have the latest version of zlib; otherwise get the latest version and -check whether the problem still exists or not. - -PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html -before asking for help. +(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example +of the library is given in the file example.c which also tests that the library +is working correctly. Another example is given in the file minigzip.c. The +compression library itself is composed of all source files except example.c and +minigzip.c. + +To compile all files and run the test program, follow the instructions given at +the top of Makefile. In short "make test; make install" should work for most +machines. For Unix: "./configure; make test; make install" For MSDOS, use one +of the special makefiles such as Makefile.msc. For VMS, use Make_vms.com or +descrip.mms. + +Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant +<info@winimage.com> for the Windows DLL version. The zlib home page is +http://www.zlib.org or http://www.gzip.org/zlib/ Before reporting a problem, +please check this site to verify that you have the latest version of zlib; +otherwise get the latest version and check whether the problem still exists or +not. + +PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html before asking +for help. Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997 issue of Dr. Dobb's Journal; a copy of the article is available in http://dogma.net/markn/articles/zlibtool/zlibtool.htm -The changes made in version 1.1.4 are documented in the file ChangeLog. -The only changes made since 1.1.3 are bug corrections: - -- ZFREE was repeated on same allocation on some error conditions. - This creates a security problem described in - http://www.zlib.org/advisory-2002-03-11.txt -- Returned incorrect error (Z_MEM_ERROR) on some invalid data -- Avoid accesses before window for invalid distances with inflate window - less than 32K. -- force windowBits > 8 to avoid a bug in the encoder for a window size - of 256 bytes. (A complete fix will be available in 1.1.5). - -The beta version 1.1.5beta includes many more changes. A new official -version 1.1.5 will be released as soon as extensive testing has been -completed on it. - +The changes made in version 1.2.1 are documented in the file ChangeLog. Unsupported third party contributions are provided in directory "contrib". A Java implementation of zlib is available in the Java Development Kit -http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html +http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html See the zlib home page http://www.zlib.org for details. -A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk> -is in the CPAN (Comprehensive Perl Archive Network) sites +A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the +CPAN (Comprehensive Perl Archive Network) sites http://www.cpan.org/modules/by-module/Compress/ -A Python interface to zlib written by A.M. Kuchling <amk@magnet.com> -is available in Python 1.5 and later versions, see +A Python interface to zlib written by A.M. Kuchling <amk@magnet.com> is +available in Python 1.5 and later versions, see http://www.python.org/doc/lib/module-zlib.html -A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> -is availlable at http://www.westend.com/~kupries/doc/trf/man/man.html +A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is +availlable at http://www.oche.de/~akupries/soft/trf/trf_zip.html -An experimental package to read and write files in .zip format, -written on top of zlib by Gilles Vollant <info@winimage.com>, is -available at http://www.winimage.com/zLibDll/unzip.html -and also in the contrib/minizip directory of zlib. +An experimental package to read and write files in .zip format, written on top +of zlib by Gilles Vollant <info@winimage.com>, is available in the +contrib/minizip directory of zlib. Notes for some targets: -- To build a Windows DLL version, include in a DLL project zlib.def, zlib.rc - and all .c files except example.c and minigzip.c; compile with -DZLIB_DLL - The zlib DLL support was initially done by Alessandro Iacopetti and is - now maintained by Gilles Vollant <info@winimage.com>. Check the zlib DLL - home page at http://www.winimage.com/zLibDll - - From Visual Basic, you can call the DLL functions which do not take - a structure as argument: compress, uncompress and all gz* functions. - See contrib/visual-basic.txt for more information, or get - http://www.tcfb.com/dowseware/cmp-z-it.zip +- For Windows DLL versions, please see win32/DLL_FAQ.txt -- For 64-bit Irix, deflate.c must be compiled without any optimization. - With -O, one libpng test fails. The test works in 32 bit mode (with - the -n32 compiler flag). The compiler bug has been reported to SGI. +- For 64-bit Irix, deflate.c must be compiled without any optimization. With + -O, one libpng test fails. The test works in 32 bit mode (with the -n32 + compiler flag). The compiler bug has been reported to SGI. -- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 - it works when compiled with cc. +- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works + when compiled with cc. -- on Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 - is necessary to get gzprintf working correctly. This is done by configure. +- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is + necessary to get gzprintf working correctly. This is done by configure. -- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works - with other compilers. Use "make test" to check your compiler. +- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with + other compilers. Use "make test" to check your compiler. - gzdopen is not supported on RISCOS, BEOS and by some Mac compilers. -- For Turbo C the small model is supported only with reduced performance to - avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3 +- For PalmOs, see http://palmzlib.sourceforge.net/ -- For PalmOs, see http://www.cs.uit.no/~perm/PASTA/pilot/software.html - Per Harald Myrvang <perm@stud.cs.uit.no> +- When building a shared, i.e. dynamic library on Mac OS X, the library must be + installed before testing (do "make install" before "make test"), since the + library location is specified in the library. Acknowledgments: @@ -116,7 +93,7 @@ Acknowledgments: Copyright notice: - (C) 1995-2002 Jean-loup Gailly and Mark Adler + (C) 1995-2003 Jean-loup Gailly and Mark Adler This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages @@ -144,4 +121,6 @@ entirely written by Jean-loup Gailly and Mark Adler; it does not include third-party code. If you redistribute modified sources, we would appreciate that you include -in the file ChangeLog history information documenting your changes. +in the file ChangeLog history information documenting your changes. Please +read the FAQ for more information on the distribution of modified source +versions. diff --git a/lib/libz/algorithm.txt b/lib/libz/algorithm.txt index cdc830b..b022dde 100644 --- a/lib/libz/algorithm.txt +++ b/lib/libz/algorithm.txt @@ -59,10 +59,10 @@ but saves time since there are both fewer insertions and fewer searches. 2.1 Introduction -The real question is, given a Huffman tree, how to decode fast. The most -important realization is that shorter codes are much more common than -longer codes, so pay attention to decoding the short codes fast, and let -the long codes take longer to decode. +The key question is how to represent a Huffman code (or any prefix code) so +that you can decode fast. The most important characteristic is that shorter +codes are much more common than longer codes, so pay attention to decoding the +short codes fast, and let the long codes take longer to decode. inflate() sets up a first level table that covers some number of bits of input less than the length of longest code. It gets that many bits from the @@ -77,58 +77,54 @@ table took no time (and if you had infinite memory), then there would only be a first level table to cover all the way to the longest code. However, building the table ends up taking a lot longer for more bits since short codes are replicated many times in such a table. What inflate() does is -simply to make the number of bits in the first table a variable, and set it -for the maximum speed. - -inflate() sends new trees relatively often, so it is possibly set for a -smaller first level table than an application that has only one tree for -all the data. For inflate, which has 286 possible codes for the -literal/length tree, the size of the first table is nine bits. Also the -distance trees have 30 possible values, and the size of the first table is -six bits. Note that for each of those cases, the table ended up one bit -longer than the ``average'' code length, i.e. the code length of an -approximately flat code which would be a little more than eight bits for -286 symbols and a little less than five bits for 30 symbols. It would be -interesting to see if optimizing the first level table for other -applications gave values within a bit or two of the flat code size. +simply to make the number of bits in the first table a variable, and then +to set that variable for the maximum speed. + +For inflate, which has 286 possible codes for the literal/length tree, the size +of the first table is nine bits. Also the distance trees have 30 possible +values, and the size of the first table is six bits. Note that for each of +those cases, the table ended up one bit longer than the ``average'' code +length, i.e. the code length of an approximately flat code which would be a +little more than eight bits for 286 symbols and a little less than five bits +for 30 symbols. 2.2 More details on the inflate table lookup -Ok, you want to know what this cleverly obfuscated inflate tree actually -looks like. You are correct that it's not a Huffman tree. It is simply a -lookup table for the first, let's say, nine bits of a Huffman symbol. The -symbol could be as short as one bit or as long as 15 bits. If a particular +Ok, you want to know what this cleverly obfuscated inflate tree actually +looks like. You are correct that it's not a Huffman tree. It is simply a +lookup table for the first, let's say, nine bits of a Huffman symbol. The +symbol could be as short as one bit or as long as 15 bits. If a particular symbol is shorter than nine bits, then that symbol's translation is duplicated -in all those entries that start with that symbol's bits. For example, if the -symbol is four bits, then it's duplicated 32 times in a nine-bit table. If a +in all those entries that start with that symbol's bits. For example, if the +symbol is four bits, then it's duplicated 32 times in a nine-bit table. If a symbol is nine bits long, it appears in the table once. -If the symbol is longer than nine bits, then that entry in the table points -to another similar table for the remaining bits. Again, there are duplicated +If the symbol is longer than nine bits, then that entry in the table points +to another similar table for the remaining bits. Again, there are duplicated entries as needed. The idea is that most of the time the symbol will be short -and there will only be one table look up. (That's whole idea behind data -compression in the first place.) For the less frequent long symbols, there -will be two lookups. If you had a compression method with really long -symbols, you could have as many levels of lookups as is efficient. For +and there will only be one table look up. (That's whole idea behind data +compression in the first place.) For the less frequent long symbols, there +will be two lookups. If you had a compression method with really long +symbols, you could have as many levels of lookups as is efficient. For inflate, two is enough. -So a table entry either points to another table (in which case nine bits in -the above example are gobbled), or it contains the translation for the symbol -and the number of bits to gobble. Then you start again with the next +So a table entry either points to another table (in which case nine bits in +the above example are gobbled), or it contains the translation for the symbol +and the number of bits to gobble. Then you start again with the next ungobbled bit. -You may wonder: why not just have one lookup table for how ever many bits the -longest symbol is? The reason is that if you do that, you end up spending -more time filling in duplicate symbol entries than you do actually decoding. -At least for deflate's output that generates new trees every several 10's of -kbytes. You can imagine that filling in a 2^15 entry table for a 15-bit code -would take too long if you're only decoding several thousand symbols. At the +You may wonder: why not just have one lookup table for how ever many bits the +longest symbol is? The reason is that if you do that, you end up spending +more time filling in duplicate symbol entries than you do actually decoding. +At least for deflate's output that generates new trees every several 10's of +kbytes. You can imagine that filling in a 2^15 entry table for a 15-bit code +would take too long if you're only decoding several thousand symbols. At the other extreme, you could make a new table for every bit in the code. In fact, -that's essentially a Huffman tree. But then you spend two much time +that's essentially a Huffman tree. But then you spend two much time traversing the tree while decoding, even for short symbols. -So the number of bits for the first lookup table is a trade of the time to +So the number of bits for the first lookup table is a trade of the time to fill out the table vs. the time spent looking at the second level and above of the table. @@ -158,7 +154,7 @@ Let's make the first table three bits long (eight entries): 110: -> table X (gobble 3 bits) 111: -> table Y (gobble 3 bits) -Each entry is what the bits decode to and how many bits that is, i.e. how +Each entry is what the bits decode as and how many bits that is, i.e. how many bits to gobble. Or the entry points to another table, with the number of bits to gobble implicit in the size of the table. @@ -170,7 +166,7 @@ long: 10: D,2 11: E,2 -Table Y is three bits long since the longest code starting with 111 is six +Table Y is three bits long since the longest code starting with 111 is six bits long: 000: F,2 @@ -182,20 +178,20 @@ bits long: 110: I,3 111: J,3 -So what we have here are three tables with a total of 20 entries that had to -be constructed. That's compared to 64 entries for a single table. Or -compared to 16 entries for a Huffman tree (six two entry tables and one four -entry table). Assuming that the code ideally represents the probability of +So what we have here are three tables with a total of 20 entries that had to +be constructed. That's compared to 64 entries for a single table. Or +compared to 16 entries for a Huffman tree (six two entry tables and one four +entry table). Assuming that the code ideally represents the probability of the symbols, it takes on the average 1.25 lookups per symbol. That's compared -to one lookup for the single table, or 1.66 lookups per symbol for the +to one lookup for the single table, or 1.66 lookups per symbol for the Huffman tree. -There, I think that gives you a picture of what's going on. For inflate, the -meaning of a particular symbol is often more than just a letter. It can be a -byte (a "literal"), or it can be either a length or a distance which -indicates a base value and a number of bits to fetch after the code that is -added to the base value. Or it might be the special end-of-block code. The -data structures created in inftrees.c try to encode all that information +There, I think that gives you a picture of what's going on. For inflate, the +meaning of a particular symbol is often more than just a letter. It can be a +byte (a "literal"), or it can be either a length or a distance which +indicates a base value and a number of bits to fetch after the code that is +added to the base value. Or it might be the special end-of-block code. The +data structures created in inftrees.c try to encode all that information compactly in the tables. @@ -210,4 +206,4 @@ Compression,'' IEEE Transactions on Information Theory, Vol. 23, No. 3, pp. 337-343. ``DEFLATE Compressed Data Format Specification'' available in -ftp://ds.internic.net/rfc/rfc1951.txt +http://www.ietf.org/rfc/rfc1951.txt diff --git a/lib/libz/crc32.h b/lib/libz/crc32.h new file mode 100644 index 0000000..8053b61 --- /dev/null +++ b/lib/libz/crc32.h @@ -0,0 +1,441 @@ +/* crc32.h -- tables for rapid CRC calculation + * Generated automatically by crc32.c + */ + +local const unsigned long FAR crc_table[TBLS][256] = +{ + { + 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL, + 0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL, + 0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL, + 0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL, + 0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL, + 0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL, + 0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL, + 0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL, + 0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL, + 0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL, + 0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL, + 0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL, + 0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL, + 0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL, + 0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL, + 0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL, + 0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL, + 0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL, + 0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL, + 0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL, + 0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL, + 0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL, + 0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL, + 0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL, + 0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL, + 0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL, + 0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL, + 0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL, + 0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL, + 0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL, + 0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL, + 0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL, + 0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL, + 0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL, + 0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL, + 0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL, + 0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL, + 0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL, + 0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL, + 0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL, + 0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL, + 0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL, + 0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL, + 0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL, + 0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL, + 0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL, + 0x4969474dUL, 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0x7dd1f39aUL, 0x3035898dUL, 0x075f4b8cUL, + 0x5ee10d8eUL, 0x698bcf8fUL, 0xec9d808aUL, 0xdbf7428bUL, 0x82490489UL, + 0xb523c688UL, 0x88649a83UL, 0xbf0e5882UL, 0xe6b01e80UL, 0xd1dadc81UL, + 0x54cc9384UL, 0x63a65185UL, 0x3a181787UL, 0x0d72d586UL, 0xa0d0e2a9UL, + 0x97ba20a8UL, 0xce0466aaUL, 0xf96ea4abUL, 0x7c78ebaeUL, 0x4b1229afUL, + 0x12ac6fadUL, 0x25c6adacUL, 0x1881f1a7UL, 0x2feb33a6UL, 0x765575a4UL, + 0x413fb7a5UL, 0xc429f8a0UL, 0xf3433aa1UL, 0xaafd7ca3UL, 0x9d97bea2UL, + 0xd073c4b5UL, 0xe71906b4UL, 0xbea740b6UL, 0x89cd82b7UL, 0x0cdbcdb2UL, + 0x3bb10fb3UL, 0x620f49b1UL, 0x55658bb0UL, 0x6822d7bbUL, 0x5f4815baUL, + 0x06f653b8UL, 0x319c91b9UL, 0xb48adebcUL, 0x83e01cbdUL, 0xda5e5abfUL, + 0xed3498beUL + }, + { + 0x00000000UL, 0x6567bcb8UL, 0x8bc809aaUL, 0xeeafb512UL, 0x5797628fUL, + 0x32f0de37UL, 0xdc5f6b25UL, 0xb938d79dUL, 0xef28b4c5UL, 0x8a4f087dUL, + 0x64e0bd6fUL, 0x018701d7UL, 0xb8bfd64aUL, 0xddd86af2UL, 0x3377dfe0UL, + 0x56106358UL, 0x9f571950UL, 0xfa30a5e8UL, 0x149f10faUL, 0x71f8ac42UL, + 0xc8c07bdfUL, 0xada7c767UL, 0x43087275UL, 0x266fcecdUL, 0x707fad95UL, + 0x1518112dUL, 0xfbb7a43fUL, 0x9ed01887UL, 0x27e8cf1aUL, 0x428f73a2UL, + 0xac20c6b0UL, 0xc9477a08UL, 0x3eaf32a0UL, 0x5bc88e18UL, 0xb5673b0aUL, + 0xd00087b2UL, 0x6938502fUL, 0x0c5fec97UL, 0xe2f05985UL, 0x8797e53dUL, + 0xd1878665UL, 0xb4e03addUL, 0x5a4f8fcfUL, 0x3f283377UL, 0x8610e4eaUL, + 0xe3775852UL, 0x0dd8ed40UL, 0x68bf51f8UL, 0xa1f82bf0UL, 0xc49f9748UL, + 0x2a30225aUL, 0x4f579ee2UL, 0xf66f497fUL, 0x9308f5c7UL, 0x7da740d5UL, + 0x18c0fc6dUL, 0x4ed09f35UL, 0x2bb7238dUL, 0xc518969fUL, 0xa07f2a27UL, + 0x1947fdbaUL, 0x7c204102UL, 0x928ff410UL, 0xf7e848a8UL, 0x3d58149bUL, + 0x583fa823UL, 0xb6901d31UL, 0xd3f7a189UL, 0x6acf7614UL, 0x0fa8caacUL, + 0xe1077fbeUL, 0x8460c306UL, 0xd270a05eUL, 0xb7171ce6UL, 0x59b8a9f4UL, + 0x3cdf154cUL, 0x85e7c2d1UL, 0xe0807e69UL, 0x0e2fcb7bUL, 0x6b4877c3UL, + 0xa20f0dcbUL, 0xc768b173UL, 0x29c70461UL, 0x4ca0b8d9UL, 0xf5986f44UL, + 0x90ffd3fcUL, 0x7e5066eeUL, 0x1b37da56UL, 0x4d27b90eUL, 0x284005b6UL, + 0xc6efb0a4UL, 0xa3880c1cUL, 0x1ab0db81UL, 0x7fd76739UL, 0x9178d22bUL, + 0xf41f6e93UL, 0x03f7263bUL, 0x66909a83UL, 0x883f2f91UL, 0xed589329UL, + 0x546044b4UL, 0x3107f80cUL, 0xdfa84d1eUL, 0xbacff1a6UL, 0xecdf92feUL, + 0x89b82e46UL, 0x67179b54UL, 0x027027ecUL, 0xbb48f071UL, 0xde2f4cc9UL, + 0x3080f9dbUL, 0x55e74563UL, 0x9ca03f6bUL, 0xf9c783d3UL, 0x176836c1UL, + 0x720f8a79UL, 0xcb375de4UL, 0xae50e15cUL, 0x40ff544eUL, 0x2598e8f6UL, + 0x73888baeUL, 0x16ef3716UL, 0xf8408204UL, 0x9d273ebcUL, 0x241fe921UL, + 0x41785599UL, 0xafd7e08bUL, 0xcab05c33UL, 0x3bb659edUL, 0x5ed1e555UL, + 0xb07e5047UL, 0xd519ecffUL, 0x6c213b62UL, 0x094687daUL, 0xe7e932c8UL, + 0x828e8e70UL, 0xd49eed28UL, 0xb1f95190UL, 0x5f56e482UL, 0x3a31583aUL, + 0x83098fa7UL, 0xe66e331fUL, 0x08c1860dUL, 0x6da63ab5UL, 0xa4e140bdUL, + 0xc186fc05UL, 0x2f294917UL, 0x4a4ef5afUL, 0xf3762232UL, 0x96119e8aUL, + 0x78be2b98UL, 0x1dd99720UL, 0x4bc9f478UL, 0x2eae48c0UL, 0xc001fdd2UL, + 0xa566416aUL, 0x1c5e96f7UL, 0x79392a4fUL, 0x97969f5dUL, 0xf2f123e5UL, + 0x05196b4dUL, 0x607ed7f5UL, 0x8ed162e7UL, 0xebb6de5fUL, 0x528e09c2UL, + 0x37e9b57aUL, 0xd9460068UL, 0xbc21bcd0UL, 0xea31df88UL, 0x8f566330UL, + 0x61f9d622UL, 0x049e6a9aUL, 0xbda6bd07UL, 0xd8c101bfUL, 0x366eb4adUL, + 0x53090815UL, 0x9a4e721dUL, 0xff29cea5UL, 0x11867bb7UL, 0x74e1c70fUL, + 0xcdd91092UL, 0xa8beac2aUL, 0x46111938UL, 0x2376a580UL, 0x7566c6d8UL, + 0x10017a60UL, 0xfeaecf72UL, 0x9bc973caUL, 0x22f1a457UL, 0x479618efUL, + 0xa939adfdUL, 0xcc5e1145UL, 0x06ee4d76UL, 0x6389f1ceUL, 0x8d2644dcUL, + 0xe841f864UL, 0x51792ff9UL, 0x341e9341UL, 0xdab12653UL, 0xbfd69aebUL, + 0xe9c6f9b3UL, 0x8ca1450bUL, 0x620ef019UL, 0x07694ca1UL, 0xbe519b3cUL, + 0xdb362784UL, 0x35999296UL, 0x50fe2e2eUL, 0x99b95426UL, 0xfcdee89eUL, + 0x12715d8cUL, 0x7716e134UL, 0xce2e36a9UL, 0xab498a11UL, 0x45e63f03UL, + 0x208183bbUL, 0x7691e0e3UL, 0x13f65c5bUL, 0xfd59e949UL, 0x983e55f1UL, + 0x2106826cUL, 0x44613ed4UL, 0xaace8bc6UL, 0xcfa9377eUL, 0x38417fd6UL, + 0x5d26c36eUL, 0xb389767cUL, 0xd6eecac4UL, 0x6fd61d59UL, 0x0ab1a1e1UL, + 0xe41e14f3UL, 0x8179a84bUL, 0xd769cb13UL, 0xb20e77abUL, 0x5ca1c2b9UL, + 0x39c67e01UL, 0x80fea99cUL, 0xe5991524UL, 0x0b36a036UL, 0x6e511c8eUL, + 0xa7166686UL, 0xc271da3eUL, 0x2cde6f2cUL, 0x49b9d394UL, 0xf0810409UL, + 0x95e6b8b1UL, 0x7b490da3UL, 0x1e2eb11bUL, 0x483ed243UL, 0x2d596efbUL, + 0xc3f6dbe9UL, 0xa6916751UL, 0x1fa9b0ccUL, 0x7ace0c74UL, 0x9461b966UL, + 0xf10605deUL +#endif + } +}; diff --git a/lib/libz/infback.c b/lib/libz/infback.c new file mode 100644 index 0000000..110b03b --- /dev/null +++ b/lib/libz/infback.c @@ -0,0 +1,619 @@ +/* infback.c -- inflate using a call-back interface + * Copyright (C) 1995-2003 Mark Adler + * For conditions of distribution and use, see copyright notice in zlib.h + */ + +/* + This code is largely copied from inflate.c. Normally either infback.o or + inflate.o would be linked into an application--not both. The interface + with inffast.c is retained so that optimized assembler-coded versions of + inflate_fast() can be used with either inflate.c or infback.c. + */ + +#include "zutil.h" +#include "inftrees.h" +#include "inflate.h" +#include "inffast.h" + +/* function prototypes */ +local void fixedtables OF((struct inflate_state FAR *state)); + +/* + strm provides memory allocation functions in zalloc and zfree, or + Z_NULL to use the library memory allocation functions. + + windowBits is in the range 8..15, and window is a user-supplied + window and output buffer that is 2**windowBits bytes. + */ +int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size) +z_stream FAR *strm; +int windowBits; +unsigned char FAR *window; +const char *version; +int stream_size; +{ + struct inflate_state FAR *state; + + if (version == Z_NULL || version[0] != ZLIB_VERSION[0] || + stream_size != (int)(sizeof(z_stream))) + return Z_VERSION_ERROR; + if (strm == Z_NULL || window == Z_NULL || + windowBits < 8 || windowBits > 15) + return Z_STREAM_ERROR; + strm->msg = Z_NULL; /* in case we return an error */ + if (strm->zalloc == (alloc_func)0) { + strm->zalloc = zcalloc; + strm->opaque = (voidpf)0; + } + if (strm->zfree == (free_func)0) strm->zfree = zcfree; + state = (struct inflate_state FAR *)ZALLOC(strm, 1, + sizeof(struct inflate_state)); + if (state == Z_NULL) return Z_MEM_ERROR; + Tracev((stderr, "inflate: allocated\n")); + strm->state = (voidpf)state; + state->wbits = windowBits; + state->wsize = 1U << windowBits; + state->window = window; + state->write = 0; + state->whave = 0; + return Z_OK; +} + +/* + Return state with length and distance decoding tables and index sizes set to + fixed code decoding. Normally this returns fixed tables from inffixed.h. + If BUILDFIXED is defined, then instead this routine builds the tables the + first time it's called, and returns those tables the first time and + thereafter. This reduces the size of the code by about 2K bytes, in + exchange for a little execution time. However, BUILDFIXED should not be + used for threaded applications, since the rewriting of the tables and virgin + may not be thread-safe. + */ +local void fixedtables(state) +struct inflate_state FAR *state; +{ +#ifdef BUILDFIXED + static int virgin = 1; + static code *lenfix, *distfix; + static code fixed[544]; + + /* build fixed huffman tables if first call (may not be thread safe) */ + if (virgin) { + unsigned sym, bits; + static code *next; + + /* literal/length table */ + sym = 0; + while (sym < 144) state->lens[sym++] = 8; + while (sym < 256) state->lens[sym++] = 9; + while (sym < 280) state->lens[sym++] = 7; + while (sym < 288) state->lens[sym++] = 8; + next = fixed; + lenfix = next; + bits = 9; + inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work); + + /* distance table */ + sym = 0; + while (sym < 32) state->lens[sym++] = 5; + distfix = next; + bits = 5; + inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work); + + /* do this just once */ + virgin = 0; + } +#else /* !BUILDFIXED */ +# include "inffixed.h" +#endif /* BUILDFIXED */ + state->lencode = lenfix; + state->lenbits = 9; + state->distcode = distfix; + state->distbits = 5; +} + +/* Macros for inflateBack(): */ + +/* Load returned state from inflate_fast() */ +#define LOAD() \ + do { \ + put = strm->next_out; \ + left = strm->avail_out; \ + next = strm->next_in; \ + have = strm->avail_in; \ + hold = state->hold; \ + bits = state->bits; \ + } while (0) + +/* Set state from registers for inflate_fast() */ +#define RESTORE() \ + do { \ + strm->next_out = put; \ + strm->avail_out = left; \ + strm->next_in = next; \ + strm->avail_in = have; \ + state->hold = hold; \ + state->bits = bits; \ + } while (0) + +/* Clear the input bit accumulator */ +#define INITBITS() \ + do { \ + hold = 0; \ + bits = 0; \ + } while (0) + +/* Assure that some input is available. If input is requested, but denied, + then return a Z_BUF_ERROR from inflateBack(). */ +#define PULL() \ + do { \ + if (have == 0) { \ + have = in(in_desc, &next); \ + if (have == 0) { \ + next = Z_NULL; \ + ret = Z_BUF_ERROR; \ + goto inf_leave; \ + } \ + } \ + } while (0) + +/* Get a byte of input into the bit accumulator, or return from inflateBack() + with an error if there is no input available. */ +#define PULLBYTE() \ + do { \ + PULL(); \ + have--; \ + hold += (unsigned long)(*next++) << bits; \ + bits += 8; \ + } while (0) + +/* Assure that there are at least n bits in the bit accumulator. If there is + not enough available input to do that, then return from inflateBack() with + an error. */ +#define NEEDBITS(n) \ + do { \ + while (bits < (unsigned)(n)) \ + PULLBYTE(); \ + } while (0) + +/* Return the low n bits of the bit accumulator (n < 16) */ +#define BITS(n) \ + ((unsigned)hold & ((1U << (n)) - 1)) + +/* Remove n bits from the bit accumulator */ +#define DROPBITS(n) \ + do { \ + hold >>= (n); \ + bits -= (unsigned)(n); \ + } while (0) + +/* Remove zero to seven bits as needed to go to a byte boundary */ +#define BYTEBITS() \ + do { \ + hold >>= bits & 7; \ + bits -= bits & 7; \ + } while (0) + +/* Assure that some output space is available, by writing out the window + if it's full. If the write fails, return from inflateBack() with a + Z_BUF_ERROR. */ +#define ROOM() \ + do { \ + if (left == 0) { \ + put = state->window; \ + left = state->wsize; \ + state->whave = left; \ + if (out(out_desc, put, left)) { \ + ret = Z_BUF_ERROR; \ + goto inf_leave; \ + } \ + } \ + } while (0) + +/* + strm provides the memory allocation functions and window buffer on input, + and provides information on the unused input on return. For Z_DATA_ERROR + returns, strm will also provide an error message. + + in() and out() are the call-back input and output functions. When + inflateBack() needs more input, it calls in(). When inflateBack() has + filled the window with output, or when it completes with data in the + window, it calls out() to write out the data. The application must not + change the provided input until in() is called again or inflateBack() + returns. The application must not change the window/output buffer until + inflateBack() returns. + + in() and out() are called with a descriptor parameter provided in the + inflateBack() call. This parameter can be a structure that provides the + information required to do the read or write, as well as accumulated + information on the input and output such as totals and check values. + + in() should return zero on failure. out() should return non-zero on + failure. If either in() or out() fails, than inflateBack() returns a + Z_BUF_ERROR. strm->next_in can be checked for Z_NULL to see whether it + was in() or out() that caused in the error. Otherwise, inflateBack() + returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format + error, or Z_MEM_ERROR if it could not allocate memory for the state. + inflateBack() can also return Z_STREAM_ERROR if the input parameters + are not correct, i.e. strm is Z_NULL or the state was not initialized. + */ +int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc) +z_stream FAR *strm; +in_func in; +void FAR *in_desc; +out_func out; +void FAR *out_desc; +{ + struct inflate_state FAR *state; + unsigned char FAR *next; /* next input */ + unsigned char FAR *put; /* next output */ + unsigned have, left; /* available input and output */ + unsigned long hold; /* bit buffer */ + unsigned bits; /* bits in bit buffer */ + unsigned copy; /* number of stored or match bytes to copy */ + unsigned char FAR *from; /* where to copy match bytes from */ + code this; /* current decoding table entry */ + code last; /* parent table entry */ + unsigned len; /* length to copy for repeats, bits to drop */ + int ret; /* return code */ + static const unsigned short order[19] = /* permutation of code lengths */ + {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}; + + /* Check that the strm exists and that the state was initialized */ + if (strm == Z_NULL || strm->state == Z_NULL) + return Z_STREAM_ERROR; + state = (struct inflate_state FAR *)strm->state; + + /* Reset the state */ + strm->msg = Z_NULL; + state->mode = TYPE; + state->last = 0; + state->whave = 0; + next = strm->next_in; + have = next != Z_NULL ? strm->avail_in : 0; + hold = 0; + bits = 0; + put = state->window; + left = state->wsize; + + /* Inflate until end of block marked as last */ + for (;;) + switch (state->mode) { + case TYPE: + /* determine and dispatch block type */ + if (state->last) { + BYTEBITS(); + state->mode = DONE; + break; + } + NEEDBITS(3); + state->last = BITS(1); + DROPBITS(1); + switch (BITS(2)) { + case 0: /* stored block */ + Tracev((stderr, "inflate: stored block%s\n", + state->last ? " (last)" : "")); + state->mode = STORED; + break; + case 1: /* fixed block */ + fixedtables(state); + Tracev((stderr, "inflate: fixed codes block%s\n", + state->last ? " (last)" : "")); + state->mode = LEN; /* decode codes */ + break; + case 2: /* dynamic block */ + Tracev((stderr, "inflate: dynamic codes block%s\n", + state->last ? " (last)" : "")); + state->mode = TABLE; + break; + case 3: + strm->msg = (char *)"invalid block type"; + state->mode = BAD; + } + DROPBITS(2); + break; + + case STORED: + /* get and verify stored block length */ + BYTEBITS(); /* go to byte boundary */ + NEEDBITS(32); + if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) { + strm->msg = (char *)"invalid stored block lengths"; + state->mode = BAD; + break; + } + state->length = (unsigned)hold & 0xffff; + Tracev((stderr, "inflate: stored length %u\n", + state->length)); + INITBITS(); + + /* copy stored block from input to output */ + while (state->length != 0) { + copy = state->length; + PULL(); + ROOM(); + if (copy > have) copy = have; + if (copy > left) copy = left; + zmemcpy(put, next, copy); + have -= copy; + next += copy; + left -= copy; + put += copy; + state->length -= copy; + } + Tracev((stderr, "inflate: stored end\n")); + state->mode = TYPE; + break; + + case TABLE: + /* get dynamic table entries descriptor */ + NEEDBITS(14); + state->nlen = BITS(5) + 257; + DROPBITS(5); + state->ndist = BITS(5) + 1; + DROPBITS(5); + state->ncode = BITS(4) + 4; + DROPBITS(4); +#ifndef PKZIP_BUG_WORKAROUND + if (state->nlen > 286 || state->ndist > 30) { + strm->msg = (char *)"too many length or distance symbols"; + state->mode = BAD; + break; + } +#endif + Tracev((stderr, "inflate: table sizes ok\n")); + + /* get code length code lengths (not a typo) */ + state->have = 0; + while (state->have < state->ncode) { + NEEDBITS(3); + state->lens[order[state->have++]] = (unsigned short)BITS(3); + DROPBITS(3); + } + while (state->have < 19) + state->lens[order[state->have++]] = 0; + state->next = state->codes; + state->lencode = (code const FAR *)(state->next); + state->lenbits = 7; + ret = inflate_table(CODES, state->lens, 19, &(state->next), + &(state->lenbits), state->work); + if (ret) { + strm->msg = (char *)"invalid code lengths set"; + state->mode = BAD; + break; + } + Tracev((stderr, "inflate: code lengths ok\n")); + + /* get length and distance code code lengths */ + state->have = 0; + while (state->have < state->nlen + state->ndist) { + for (;;) { + this = state->lencode[BITS(state->lenbits)]; + if ((unsigned)(this.bits) <= bits) break; + PULLBYTE(); + } + if (this.val < 16) { + NEEDBITS(this.bits); + DROPBITS(this.bits); + state->lens[state->have++] = this.val; + } + else { + if (this.val == 16) { + NEEDBITS(this.bits + 2); + DROPBITS(this.bits); + if (state->have == 0) { + strm->msg = (char *)"invalid bit length repeat"; + state->mode = BAD; + break; + } + len = (unsigned)(state->lens[state->have - 1]); + copy = 3 + BITS(2); + DROPBITS(2); + } + else if (this.val == 17) { + NEEDBITS(this.bits + 3); + DROPBITS(this.bits); + len = 0; + copy = 3 + BITS(3); + DROPBITS(3); + } + else { + NEEDBITS(this.bits + 7); + DROPBITS(this.bits); + len = 0; + copy = 11 + BITS(7); + DROPBITS(7); + } + if (state->have + copy > state->nlen + state->ndist) { + strm->msg = (char *)"invalid bit length repeat"; + state->mode = BAD; + break; + } + while (copy--) + state->lens[state->have++] = (unsigned short)len; + } + } + + /* build code tables */ + state->next = state->codes; + state->lencode = (code const FAR *)(state->next); + state->lenbits = 9; + ret = inflate_table(LENS, state->lens, state->nlen, &(state->next), + &(state->lenbits), state->work); + if (ret) { + strm->msg = (char *)"invalid literal/lengths set"; + state->mode = BAD; + break; + } + state->distcode = (code const FAR *)(state->next); + state->distbits = 6; + ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist, + &(state->next), &(state->distbits), state->work); + if (ret) { + strm->msg = (char *)"invalid distances set"; + state->mode = BAD; + break; + } + Tracev((stderr, "inflate: codes ok\n")); + state->mode = LEN; + + case LEN: + /* use inflate_fast() if we have enough input and output */ + if (have >= 6 && left >= 258) { + RESTORE(); + if (state->whave < state->wsize) + state->whave = state->wsize - left; + inflate_fast(strm, state->wsize); + LOAD(); + break; + } + + /* get a literal, length, or end-of-block code */ + for (;;) { + this = state->lencode[BITS(state->lenbits)]; + if ((unsigned)(this.bits) <= bits) break; + PULLBYTE(); + } + if (this.op && (this.op & 0xf0) == 0) { + last = this; + for (;;) { + this = state->lencode[last.val + + (BITS(last.bits + last.op) >> last.bits)]; + if ((unsigned)(last.bits + this.bits) <= bits) break; + PULLBYTE(); + } + DROPBITS(last.bits); + } + DROPBITS(this.bits); + state->length = (unsigned)this.val; + + /* process literal */ + if (this.op == 0) { + Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ? + "inflate: literal '%c'\n" : + "inflate: literal 0x%02x\n", this.val)); + ROOM(); + *put++ = (unsigned char)(state->length); + left--; + state->mode = LEN; + break; + } + + /* process end of block */ + if (this.op & 32) { + Tracevv((stderr, "inflate: end of block\n")); + state->mode = TYPE; + break; + } + + /* invalid code */ + if (this.op & 64) { + strm->msg = (char *)"invalid literal/length code"; + state->mode = BAD; + break; + } + + /* length code -- get extra bits, if any */ + state->extra = (unsigned)(this.op) & 15; + if (state->extra != 0) { + NEEDBITS(state->extra); + state->length += BITS(state->extra); + DROPBITS(state->extra); + } + Tracevv((stderr, "inflate: length %u\n", state->length)); + + /* get distance code */ + for (;;) { + this = state->distcode[BITS(state->distbits)]; + if ((unsigned)(this.bits) <= bits) break; + PULLBYTE(); + } + if ((this.op & 0xf0) == 0) { + last = this; + for (;;) { + this = state->distcode[last.val + + (BITS(last.bits + last.op) >> last.bits)]; + if ((unsigned)(last.bits + this.bits) <= bits) break; + PULLBYTE(); + } + DROPBITS(last.bits); + } + DROPBITS(this.bits); + if (this.op & 64) { + strm->msg = (char *)"invalid distance code"; + state->mode = BAD; + break; + } + state->offset = (unsigned)this.val; + + /* get distance extra bits, if any */ + state->extra = (unsigned)(this.op) & 15; + if (state->extra != 0) { + NEEDBITS(state->extra); + state->offset += BITS(state->extra); + DROPBITS(state->extra); + } + if (state->offset > state->wsize - (state->whave < state->wsize ? + left : 0)) { + strm->msg = (char *)"invalid distance too far back"; + state->mode = BAD; + break; + } + Tracevv((stderr, "inflate: distance %u\n", state->offset)); + + /* copy match from window to output */ + do { + ROOM(); + copy = state->wsize - state->offset; + if (copy < left) { + from = put + copy; + copy = left - copy; + } + else { + from = put - state->offset; + copy = left; + } + if (copy > state->length) copy = state->length; + state->length -= copy; + left -= copy; + do { + *put++ = *from++; + } while (--copy); + } while (state->length != 0); + break; + + case DONE: + /* inflate stream terminated properly -- write leftover output */ + ret = Z_STREAM_END; + if (left < state->wsize) { + if (out(out_desc, state->window, state->wsize - left)) + ret = Z_BUF_ERROR; + } + goto inf_leave; + + case BAD: + ret = Z_DATA_ERROR; + goto inf_leave; + + default: /* can't happen, but makes compilers happy */ + ret = Z_STREAM_ERROR; + goto inf_leave; + } + + /* Return unused input */ + inf_leave: + strm->next_in = next; + strm->avail_in = have; + return ret; +} + +int ZEXPORT inflateBackEnd(strm) +z_stream FAR *strm; +{ + if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0) + return Z_STREAM_ERROR; + ZFREE(strm, strm->state); + strm->state = Z_NULL; + Tracev((stderr, "inflate: end\n")); + return Z_OK; +} diff --git a/lib/libz/inffast.h b/lib/libz/inffast.h index a31a4bb..1e88d2d 100644 --- a/lib/libz/inffast.h +++ b/lib/libz/inffast.h @@ -1,6 +1,6 @@ /* inffast.h -- header to use inffast.c - * Copyright (C) 1995-2002 Mark Adler - * For conditions of distribution and use, see copyright notice in zlib.h + * Copyright (C) 1995-2003 Mark Adler + * For conditions of distribution and use, see copyright notice in zlib.h */ /* WARNING: this file should *not* be used by applications. It is @@ -8,10 +8,4 @@ subject to change. Applications should only use zlib.h. */ -extern int inflate_fast OF(( - uInt, - uInt, - inflate_huft *, - inflate_huft *, - inflate_blocks_statef *, - z_streamp )); +void inflate_fast OF((z_streamp strm, unsigned start)); diff --git a/lib/libz/inffixed.h b/lib/libz/inffixed.h index 77f7e76..75ed4b5 100644 --- a/lib/libz/inffixed.h +++ b/lib/libz/inffixed.h @@ -1,151 +1,94 @@ -/* inffixed.h -- table for decoding fixed codes - * Generated automatically by the maketree.c program - */ + /* inffixed.h -- table for decoding fixed codes + * Generated automatically by makefixed(). + */ -/* WARNING: this file should *not* be used by applications. It is - part of the implementation of the compression library and is - subject to change. Applications should only use zlib.h. - */ + /* WARNING: this file should *not* be used by applications. It + is part of the implementation of the compression library and + is subject to change. Applications should only use zlib.h. + */ -local uInt fixed_bl = 9; -local uInt fixed_bd = 5; -local inflate_huft fixed_tl[] = { - {{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115}, - {{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},192}, - {{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},160}, - {{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},224}, - {{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},144}, - {{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},208}, - {{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},176}, - {{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},240}, - {{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227}, - {{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},200}, - {{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},168}, - {{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},232}, - {{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},152}, - {{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},216}, - {{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},184}, - {{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},248}, - {{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163}, - {{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},196}, - {{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},164}, - {{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},228}, - {{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},148}, - {{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},212}, - {{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},180}, - {{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},244}, - {{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0}, - {{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},204}, - {{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},172}, - {{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},236}, - {{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},156}, - {{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},220}, - {{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},188}, - {{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},252}, - {{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131}, - {{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},194}, - {{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},162}, - {{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},226}, - {{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},146}, - {{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},210}, - {{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},178}, - {{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},242}, - {{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258}, - {{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},202}, - {{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},170}, - {{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},234}, - {{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},154}, - {{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},218}, - {{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},186}, - {{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},250}, - {{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195}, - {{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},198}, - {{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},166}, - {{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},230}, - {{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},150}, - {{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},214}, - {{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},182}, - {{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},246}, - {{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0}, - {{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},206}, - {{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},174}, - {{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},238}, - {{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},158}, - {{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},222}, - {{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},190}, - {{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},254}, - {{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115}, - {{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},193}, - {{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},161}, - {{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},225}, - {{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},145}, - {{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},209}, - {{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},177}, - {{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},241}, - {{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227}, - {{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},201}, - {{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},169}, - {{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},233}, - {{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},153}, - {{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},217}, - {{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},185}, - {{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},249}, - {{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163}, - {{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},197}, - {{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},165}, - {{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},229}, - {{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},149}, - {{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},213}, - {{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},181}, - {{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},245}, - {{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0}, - {{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},205}, - {{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},173}, - {{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},237}, - {{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},157}, - {{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},221}, - {{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},189}, - {{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},253}, - {{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131}, - {{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},195}, - {{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},163}, - {{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},227}, - {{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},147}, - {{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},211}, - {{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},179}, - {{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},243}, - {{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258}, - {{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},203}, - {{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},171}, - {{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},235}, - {{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},155}, - {{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},219}, - {{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},187}, - {{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},251}, - {{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195}, - {{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},199}, - {{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},167}, - {{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},231}, - {{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},151}, - {{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},215}, - {{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},183}, - {{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},247}, - {{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0}, - {{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},207}, - {{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},175}, - {{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},239}, - {{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},159}, - {{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},223}, - {{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},191}, - {{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},255} - }; -local inflate_huft fixed_td[] = { - {{{80,5}},1}, {{{87,5}},257}, {{{83,5}},17}, {{{91,5}},4097}, - {{{81,5}},5}, {{{89,5}},1025}, {{{85,5}},65}, {{{93,5}},16385}, - {{{80,5}},3}, {{{88,5}},513}, {{{84,5}},33}, {{{92,5}},8193}, - {{{82,5}},9}, {{{90,5}},2049}, {{{86,5}},129}, {{{192,5}},24577}, - {{{80,5}},2}, {{{87,5}},385}, {{{83,5}},25}, {{{91,5}},6145}, - {{{81,5}},7}, {{{89,5}},1537}, {{{85,5}},97}, {{{93,5}},24577}, - {{{80,5}},4}, {{{88,5}},769}, {{{84,5}},49}, {{{92,5}},12289}, - {{{82,5}},13}, {{{90,5}},3073}, {{{86,5}},193}, {{{192,5}},24577} - }; + static const code lenfix[512] = { + {96,7,0},{0,8,80},{0,8,16},{20,8,115},{18,7,31},{0,8,112},{0,8,48}, + {0,9,192},{16,7,10},{0,8,96},{0,8,32},{0,9,160},{0,8,0},{0,8,128}, + {0,8,64},{0,9,224},{16,7,6},{0,8,88},{0,8,24},{0,9,144},{19,7,59}, + {0,8,120},{0,8,56},{0,9,208},{17,7,17},{0,8,104},{0,8,40},{0,9,176}, + {0,8,8},{0,8,136},{0,8,72},{0,9,240},{16,7,4},{0,8,84},{0,8,20}, + {21,8,227},{19,7,43},{0,8,116},{0,8,52},{0,9,200},{17,7,13},{0,8,100}, + {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},{16,7,8}, + {0,8,92},{0,8,28},{0,9,152},{20,7,83},{0,8,124},{0,8,60},{0,9,216}, + {18,7,23},{0,8,108},{0,8,44},{0,9,184},{0,8,12},{0,8,140},{0,8,76}, + {0,9,248},{16,7,3},{0,8,82},{0,8,18},{21,8,163},{19,7,35},{0,8,114}, + {0,8,50},{0,9,196},{17,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2}, + {0,8,130},{0,8,66},{0,9,228},{16,7,7},{0,8,90},{0,8,26},{0,9,148}, + {20,7,67},{0,8,122},{0,8,58},{0,9,212},{18,7,19},{0,8,106},{0,8,42}, + {0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},{16,7,5},{0,8,86}, + {0,8,22},{64,8,0},{19,7,51},{0,8,118},{0,8,54},{0,9,204},{17,7,15}, + {0,8,102},{0,8,38},{0,9,172},{0,8,6},{0,8,134},{0,8,70},{0,9,236}, + {16,7,9},{0,8,94},{0,8,30},{0,9,156},{20,7,99},{0,8,126},{0,8,62}, + {0,9,220},{18,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142}, + {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{21,8,131},{18,7,31}, + {0,8,113},{0,8,49},{0,9,194},{16,7,10},{0,8,97},{0,8,33},{0,9,162}, + {0,8,1},{0,8,129},{0,8,65},{0,9,226},{16,7,6},{0,8,89},{0,8,25}, + {0,9,146},{19,7,59},{0,8,121},{0,8,57},{0,9,210},{17,7,17},{0,8,105}, + {0,8,41},{0,9,178},{0,8,9},{0,8,137},{0,8,73},{0,9,242},{16,7,4}, + {0,8,85},{0,8,21},{16,8,258},{19,7,43},{0,8,117},{0,8,53},{0,9,202}, + {17,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},{0,8,69}, + {0,9,234},{16,7,8},{0,8,93},{0,8,29},{0,9,154},{20,7,83},{0,8,125}, + {0,8,61},{0,9,218},{18,7,23},{0,8,109},{0,8,45},{0,9,186},{0,8,13}, + {0,8,141},{0,8,77},{0,9,250},{16,7,3},{0,8,83},{0,8,19},{21,8,195}, + {19,7,35},{0,8,115},{0,8,51},{0,9,198},{17,7,11},{0,8,99},{0,8,35}, + {0,9,166},{0,8,3},{0,8,131},{0,8,67},{0,9,230},{16,7,7},{0,8,91}, + {0,8,27},{0,9,150},{20,7,67},{0,8,123},{0,8,59},{0,9,214},{18,7,19}, + {0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},{0,8,75},{0,9,246}, + {16,7,5},{0,8,87},{0,8,23},{64,8,0},{19,7,51},{0,8,119},{0,8,55}, + {0,9,206},{17,7,15},{0,8,103},{0,8,39},{0,9,174},{0,8,7},{0,8,135}, + {0,8,71},{0,9,238},{16,7,9},{0,8,95},{0,8,31},{0,9,158},{20,7,99}, + {0,8,127},{0,8,63},{0,9,222},{18,7,27},{0,8,111},{0,8,47},{0,9,190}, + {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},{0,8,16}, + {20,8,115},{18,7,31},{0,8,112},{0,8,48},{0,9,193},{16,7,10},{0,8,96}, + {0,8,32},{0,9,161},{0,8,0},{0,8,128},{0,8,64},{0,9,225},{16,7,6}, + {0,8,88},{0,8,24},{0,9,145},{19,7,59},{0,8,120},{0,8,56},{0,9,209}, + {17,7,17},{0,8,104},{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72}, + {0,9,241},{16,7,4},{0,8,84},{0,8,20},{21,8,227},{19,7,43},{0,8,116}, + {0,8,52},{0,9,201},{17,7,13},{0,8,100},{0,8,36},{0,9,169},{0,8,4}, + {0,8,132},{0,8,68},{0,9,233},{16,7,8},{0,8,92},{0,8,28},{0,9,153}, + {20,7,83},{0,8,124},{0,8,60},{0,9,217},{18,7,23},{0,8,108},{0,8,44}, + {0,9,185},{0,8,12},{0,8,140},{0,8,76},{0,9,249},{16,7,3},{0,8,82}, + {0,8,18},{21,8,163},{19,7,35},{0,8,114},{0,8,50},{0,9,197},{17,7,11}, + {0,8,98},{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229}, + {16,7,7},{0,8,90},{0,8,26},{0,9,149},{20,7,67},{0,8,122},{0,8,58}, + {0,9,213},{18,7,19},{0,8,106},{0,8,42},{0,9,181},{0,8,10},{0,8,138}, + {0,8,74},{0,9,245},{16,7,5},{0,8,86},{0,8,22},{64,8,0},{19,7,51}, + {0,8,118},{0,8,54},{0,9,205},{17,7,15},{0,8,102},{0,8,38},{0,9,173}, + {0,8,6},{0,8,134},{0,8,70},{0,9,237},{16,7,9},{0,8,94},{0,8,30}, + {0,9,157},{20,7,99},{0,8,126},{0,8,62},{0,9,221},{18,7,27},{0,8,110}, + {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},{96,7,0}, + {0,8,81},{0,8,17},{21,8,131},{18,7,31},{0,8,113},{0,8,49},{0,9,195}, + {16,7,10},{0,8,97},{0,8,33},{0,9,163},{0,8,1},{0,8,129},{0,8,65}, + {0,9,227},{16,7,6},{0,8,89},{0,8,25},{0,9,147},{19,7,59},{0,8,121}, + {0,8,57},{0,9,211},{17,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9}, + {0,8,137},{0,8,73},{0,9,243},{16,7,4},{0,8,85},{0,8,21},{16,8,258}, + {19,7,43},{0,8,117},{0,8,53},{0,9,203},{17,7,13},{0,8,101},{0,8,37}, + {0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},{16,7,8},{0,8,93}, + {0,8,29},{0,9,155},{20,7,83},{0,8,125},{0,8,61},{0,9,219},{18,7,23}, + {0,8,109},{0,8,45},{0,9,187},{0,8,13},{0,8,141},{0,8,77},{0,9,251}, + {16,7,3},{0,8,83},{0,8,19},{21,8,195},{19,7,35},{0,8,115},{0,8,51}, + {0,9,199},{17,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131}, + {0,8,67},{0,9,231},{16,7,7},{0,8,91},{0,8,27},{0,9,151},{20,7,67}, + {0,8,123},{0,8,59},{0,9,215},{18,7,19},{0,8,107},{0,8,43},{0,9,183}, + {0,8,11},{0,8,139},{0,8,75},{0,9,247},{16,7,5},{0,8,87},{0,8,23}, + {64,8,0},{19,7,51},{0,8,119},{0,8,55},{0,9,207},{17,7,15},{0,8,103}, + {0,8,39},{0,9,175},{0,8,7},{0,8,135},{0,8,71},{0,9,239},{16,7,9}, + {0,8,95},{0,8,31},{0,9,159},{20,7,99},{0,8,127},{0,8,63},{0,9,223}, + {18,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},{0,8,79}, + {0,9,255} + }; + + static const code distfix[32] = { + {16,5,1},{23,5,257},{19,5,17},{27,5,4097},{17,5,5},{25,5,1025}, + {21,5,65},{29,5,16385},{16,5,3},{24,5,513},{20,5,33},{28,5,8193}, + {18,5,9},{26,5,2049},{22,5,129},{64,5,0},{16,5,2},{23,5,385}, + {19,5,25},{27,5,6145},{17,5,7},{25,5,1537},{21,5,97},{29,5,24577}, + {16,5,4},{24,5,769},{20,5,49},{28,5,12289},{18,5,13},{26,5,3073}, + {22,5,193},{64,5,0} + }; diff --git a/lib/libz/inflate.h b/lib/libz/inflate.h new file mode 100644 index 0000000..9a12c8f --- /dev/null +++ b/lib/libz/inflate.h @@ -0,0 +1,117 @@ +/* inflate.h -- internal inflate state definition + * Copyright (C) 1995-2003 Mark Adler + * For conditions of distribution and use, see copyright notice in zlib.h + */ + +/* WARNING: this file should *not* be used by applications. It is + part of the implementation of the compression library and is + subject to change. Applications should only use zlib.h. + */ + +/* define NO_GZIP when compiling if you want to disable gzip header and + trailer decoding by inflate(). NO_GZIP would be used to avoid linking in + the crc code when it is not needed. For shared libraries, gzip decoding + should be left enabled. */ +#ifndef NO_GZIP +# define GUNZIP +#endif + +/* Possible inflate modes between inflate() calls */ +typedef enum { + HEAD, /* i: waiting for magic header */ +#ifdef GUNZIP + FLAGS, /* i: waiting for method and flags (gzip) */ + TIME, /* i: waiting for modification time (gzip) */ + OS, /* i: waiting for extra flags and operating system (gzip) */ + EXLEN, /* i: waiting for extra length (gzip) */ + EXTRA, /* i: waiting for extra bytes (gzip) */ + NAME, /* i: waiting for end of file name (gzip) */ + COMMENT, /* i: waiting for end of comment (gzip) */ + HCRC, /* i: waiting for header crc (gzip) */ +#endif + DICTID, /* i: waiting for dictionary check value */ + DICT, /* waiting for inflateSetDictionary() call */ + TYPE, /* i: waiting for type bits, including last-flag bit */ + TYPEDO, /* i: same, but skip check to exit inflate on new block */ + STORED, /* i: waiting for stored size (length and complement) */ + COPY, /* i/o: waiting for input or output to copy stored block */ + TABLE, /* i: waiting for dynamic block table lengths */ + LENLENS, /* i: waiting for code length code lengths */ + CODELENS, /* i: waiting for length/lit and distance code lengths */ + LEN, /* i: waiting for length/lit code */ + LENEXT, /* i: waiting for length extra bits */ + DIST, /* i: waiting for distance code */ + DISTEXT, /* i: waiting for distance extra bits */ + MATCH, /* o: waiting for output space to copy string */ + LIT, /* o: waiting for output space to write literal */ + CHECK, /* i: waiting for 32-bit check value */ +#ifdef GUNZIP + LENGTH, /* i: waiting for 32-bit length (gzip) */ +#endif + DONE, /* finished check, done -- remain here until reset */ + BAD, /* got a data error -- remain here until reset */ + MEM, /* got an inflate() memory error -- remain here until reset */ + SYNC /* looking for synchronization bytes to restart inflate() */ +} inflate_mode; + +/* + State transitions between above modes - + + (most modes can go to the BAD or MEM mode -- not shown for clarity) + + Process header: + HEAD -> (gzip) or (zlib) + (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME + NAME -> COMMENT -> HCRC -> TYPE + (zlib) -> DICTID or TYPE + DICTID -> DICT -> TYPE + Read deflate blocks: + TYPE -> STORED or TABLE or LEN or CHECK + STORED -> COPY -> TYPE + TABLE -> LENLENS -> CODELENS -> LEN + Read deflate codes: + LEN -> LENEXT or LIT or TYPE + LENEXT -> DIST -> DISTEXT -> MATCH -> LEN + LIT -> LEN + Process trailer: + CHECK -> LENGTH -> DONE + */ + +/* state maintained between inflate() calls. Approximately 7K bytes. */ +struct inflate_state { + inflate_mode mode; /* current inflate mode */ + int last; /* true if processing last block */ + int wrap; /* bit 0 true for zlib, bit 1 true for gzip */ + int havedict; /* true if dictionary provided */ + int flags; /* gzip header method and flags (0 if zlib) */ + unsigned long check; /* protected copy of check value */ + unsigned long total; /* protected copy of output count */ + /* sliding window */ + unsigned wbits; /* log base 2 of requested window size */ + unsigned wsize; /* window size or zero if not using window */ + unsigned whave; /* valid bytes in the window */ + unsigned write; /* window write index */ + unsigned char FAR *window; /* allocated sliding window, if needed */ + /* bit accumulator */ + unsigned long hold; /* input bit accumulator */ + unsigned bits; /* number of bits in "in" */ + /* for string and stored block copying */ + unsigned length; /* literal or length of data to copy */ + unsigned offset; /* distance back to copy string from */ + /* for table and code decoding */ + unsigned extra; /* extra bits needed */ + /* fixed and dynamic code tables */ + code const FAR *lencode; /* starting table for length/literal codes */ + code const FAR *distcode; /* starting table for distance codes */ + unsigned lenbits; /* index bits for lencode */ + unsigned distbits; /* index bits for distcode */ + /* dynamic table building */ + unsigned ncode; /* number of code length code lengths */ + unsigned nlen; /* number of length code lengths */ + unsigned ndist; /* number of distance code lengths */ + unsigned have; /* number of code lengths in lens[] */ + code FAR *next; /* next available space in codes[] */ + unsigned short lens[320]; /* temporary storage for code lengths */ + unsigned short work[288]; /* work area for code table building */ + code codes[ENOUGH]; /* space for code tables */ +}; diff --git a/lib/libz/inftrees.h b/lib/libz/inftrees.h index 04b73b7..82d365a 100644 --- a/lib/libz/inftrees.h +++ b/lib/libz/inftrees.h @@ -1,6 +1,6 @@ /* inftrees.h -- header to use inftrees.c - * Copyright (C) 1995-2002 Mark Adler - * For conditions of distribution and use, see copyright notice in zlib.h + * Copyright (C) 1995-2003 Mark Adler + * For conditions of distribution and use, see copyright notice in zlib.h */ /* WARNING: this file should *not* be used by applications. It is @@ -8,51 +8,48 @@ subject to change. Applications should only use zlib.h. */ -/* Huffman code lookup table entry--this entry is four bytes for machines - that have 16-bit pointers (e.g. PC's in the small or medium model). */ - -typedef struct inflate_huft_s FAR inflate_huft; - -struct inflate_huft_s { - union { - struct { - Byte Exop; /* number of extra bits or operation */ - Byte Bits; /* number of bits in this code or subcode */ - } what; - uInt pad; /* pad structure to a power of 2 (4 bytes for */ - } word; /* 16-bit, 8 bytes for 32-bit int's) */ - uInt base; /* literal, length base, distance base, - or table offset */ -}; +/* Structure for decoding tables. Each entry provides either the + information needed to do the operation requested by the code that + indexed that table entry, or it provides a pointer to another + table that indexes more bits of the code. op indicates whether + the entry is a pointer to another table, a literal, a length or + distance, an end-of-block, or an invalid code. For a table + pointer, the low four bits of op is the number of index bits of + that table. For a length or distance, the low four bits of op + is the number of extra bits to get after the code. bits is + the number of bits in this code or part of the code to drop off + of the bit buffer. val is the actual byte to output in the case + of a literal, the base length or distance, or the offset from + the current table to the next table. Each entry is four bytes. */ +typedef struct { + unsigned char op; /* operation, extra bits, table bits */ + unsigned char bits; /* bits in this part of the code */ + unsigned short val; /* offset in table or code value */ +} code; + +/* op values as set by inflate_table(): + 00000000 - literal + 0000tttt - table link, tttt != 0 is the number of table index bits + 0001eeee - length or distance, eeee is the number of extra bits + 01100000 - end of block + 01000000 - invalid code + */ /* Maximum size of dynamic tree. The maximum found in a long but non- - exhaustive search was 1004 huft structures (850 for length/literals + exhaustive search was 1004 code structures (850 for length/literals and 154 for distances, the latter actually the result of an - exhaustive search). The actual maximum is not known, but the - value below is more than safe. */ -#define MANY 1440 - -extern int inflate_trees_bits OF(( - uIntf *, /* 19 code lengths */ - uIntf *, /* bits tree desired/actual depth */ - inflate_huft * FAR *, /* bits tree result */ - inflate_huft *, /* space for trees */ - z_streamp)); /* for messages */ - -extern int inflate_trees_dynamic OF(( - uInt, /* number of literal/length codes */ - uInt, /* number of distance codes */ - uIntf *, /* that many (total) code lengths */ - uIntf *, /* literal desired/actual bit depth */ - uIntf *, /* distance desired/actual bit depth */ - inflate_huft * FAR *, /* literal/length tree result */ - inflate_huft * FAR *, /* distance tree result */ - inflate_huft *, /* space for trees */ - z_streamp)); /* for messages */ - -extern int inflate_trees_fixed OF(( - uIntf *, /* literal desired/actual bit depth */ - uIntf *, /* distance desired/actual bit depth */ - inflate_huft * FAR *, /* literal/length tree result */ - inflate_huft * FAR *, /* distance tree result */ - z_streamp)); /* for memory allocation */ + exhaustive search). The true maximum is not known, but the value + below is more than safe. */ +#define ENOUGH 1440 +#define MAXD 154 + +/* Type of code to build for inftable() */ +typedef enum { + CODES, + LENS, + DISTS +} codetype; + +extern int inflate_table OF((codetype type, unsigned short FAR *lens, + unsigned codes, code FAR * FAR *table, + unsigned FAR *bits, unsigned short FAR *work)); diff --git a/lib/libz/zlib.h b/lib/libz/zlib.h index 52cb529..92edf96 100644 --- a/lib/libz/zlib.h +++ b/lib/libz/zlib.h @@ -1,7 +1,7 @@ /* zlib.h -- interface of the 'zlib' general purpose compression library - version 1.1.4, March 11th, 2002 + version 1.2.1, November 17th, 2003 - Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler + Copyright (C) 1995-2003 Jean-loup Gailly and Mark Adler This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages @@ -24,12 +24,12 @@ The data format used by the zlib library is described by RFCs (Request for - Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt + Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format). */ -#ifndef _ZLIB_H -#define _ZLIB_H +#ifndef ZLIB_H +#define ZLIB_H #include "zconf.h" @@ -37,9 +37,10 @@ extern "C" { #endif -#define ZLIB_VERSION "1.1.4" +#define ZLIB_VERSION "1.2.1" +#define ZLIB_VERNUM 0x1210 -/* +/* The 'zlib' compression library provides in-memory compression and decompression functions, including integrity checks of the uncompressed data. This version of the library supports only one compression method @@ -52,8 +53,23 @@ extern "C" { application must provide more input and/or consume the output (providing more output space) before each call. + The compressed data format used by the in-memory functions is the zlib + format, which is a zlib wrapper documented in RFC 1950, wrapped around a + deflate stream, which is itself documented in RFC 1951. + The library also supports reading and writing files in gzip (.gz) format - with an interface similar to that of stdio. + with an interface similar to that of stdio using the functions that start + with "gz". The gzip format is different from the zlib format. gzip is a + gzip wrapper, documented in RFC 1952, wrapped around a deflate stream. + + The zlib format was designed to be compact and fast for use in memory + and on communications channels. The gzip format was designed for single- + file compression on file systems, has a larger header than zlib to maintain + directory information, and uses a different, slower check method than zlib. + + This library does not provide any functions to write gzip files in memory. + However such functions could be easily written using zlib's deflate function, + the documentation in the gzip RFC, and the examples in gzio.c. The library does not install any signal handler. The decoder checks the consistency of the compressed data, so the library should never @@ -127,7 +143,8 @@ typedef z_stream FAR *z_streamp; #define Z_SYNC_FLUSH 2 #define Z_FULL_FLUSH 3 #define Z_FINISH 4 -/* Allowed flush values; see deflate() below for details */ +#define Z_BLOCK 5 +/* Allowed flush values; see deflate() and inflate() below for details */ #define Z_OK 0 #define Z_STREAM_END 1 @@ -150,13 +167,14 @@ typedef z_stream FAR *z_streamp; #define Z_FILTERED 1 #define Z_HUFFMAN_ONLY 2 +#define Z_RLE 3 #define Z_DEFAULT_STRATEGY 0 /* compression strategy; see deflateInit2() below for details */ #define Z_BINARY 0 #define Z_ASCII 1 #define Z_UNKNOWN 2 -/* Possible values of the data_type field */ +/* Possible values of the data_type field (though see inflate()) */ #define Z_DEFLATED 8 /* The deflate compression method (the only one supported in this version) */ @@ -175,7 +193,7 @@ ZEXTERN const char * ZEXPORT zlibVersion OF((void)); This check is automatically made by deflateInit and inflateInit. */ -/* +/* ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level)); Initializes the internal stream state for compression. The fields @@ -244,7 +262,9 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush)); If deflate returns with avail_out == 0, this function must be called again with the same value of the flush parameter and more output space (updated avail_out), until the flush is complete (deflate returns with non-zero - avail_out). + avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that + avail_out is greater than six to avoid repeated flush markers due to + avail_out == 0 on return. If the parameter flush is set to Z_FINISH, pending input is processed, pending output is flushed and deflate returns with Z_STREAM_END if there @@ -253,10 +273,10 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush)); more input data, until it returns with Z_STREAM_END or an error. After deflate has returned Z_STREAM_END, the only possible operations on the stream are deflateReset or deflateEnd. - + Z_FINISH can be used immediately after deflateInit if all the compression is to be done in a single step. In this case, avail_out must be at least - 0.1% larger than avail_in plus 12 bytes. If deflate does not return + the value returned by deflateBound (see below). If deflate does not return Z_STREAM_END, then it must be called again as described above. deflate() sets strm->adler to the adler32 checksum of all input read @@ -272,7 +292,9 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush)); consumed and all output has been produced (only when flush is set to Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible - (for example avail_in or avail_out was zero). + (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not + fatal, and deflate() can be called again with more input and more output + space to continue compressing. */ @@ -290,7 +312,7 @@ ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm)); */ -/* +/* ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm)); Initializes the internal stream state for decompression. The fields @@ -314,9 +336,9 @@ ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm)); ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush)); /* inflate decompresses as much data as possible, and stops when the input - buffer becomes empty or the output buffer becomes full. It may some - introduce some output latency (reading input without producing any output) - except when forced to flush. + buffer becomes empty or the output buffer becomes full. It may introduce + some output latency (reading input without producing any output) except when + forced to flush. The detailed semantics are as follows. inflate performs one or both of the following actions: @@ -340,11 +362,26 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush)); must be called again after making room in the output buffer because there might be more output pending. - If the parameter flush is set to Z_SYNC_FLUSH, inflate flushes as much - output as possible to the output buffer. The flushing behavior of inflate is - not specified for values of the flush parameter other than Z_SYNC_FLUSH - and Z_FINISH, but the current implementation actually flushes as much output - as possible anyway. + The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, + Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much + output as possible to the output buffer. Z_BLOCK requests that inflate() stop + if and when it get to the next deflate block boundary. When decoding the zlib + or gzip format, this will cause inflate() to return immediately after the + header and before the first block. When doing a raw inflate, inflate() will + go ahead and process the first block, and will return when it gets to the end + of that block, or when it runs out of data. + + The Z_BLOCK option assists in appending to or combining deflate streams. + Also to assist in this, on return inflate() will set strm->data_type to the + number of unused bits in the last byte taken from strm->next_in, plus 64 + if inflate() is currently decoding the last block in the deflate stream, + plus 128 if inflate() returned immediately after decoding an end-of-block + code or decoding the complete header up to just before the first byte of the + deflate stream. The end-of-block will not be indicated until all of the + uncompressed data from that block has been written to strm->next_out. The + number of unused bits may in general be greater than seven, except when + bit 7 of data_type is set, in which case the number of unused bits will be + less than eight. inflate() should normally be called until it returns Z_STREAM_END or an error. However if all decompression is to be performed in a single step @@ -354,29 +391,44 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush)); uncompressed data. (The size of the uncompressed data may have been saved by the compressor for this purpose.) The next operation on this stream must be inflateEnd to deallocate the decompression state. The use of Z_FINISH - is never required, but can be used to inform inflate that a faster routine + is never required, but can be used to inform inflate that a faster approach may be used for the single inflate() call. - If a preset dictionary is needed at this point (see inflateSetDictionary - below), inflate sets strm-adler to the adler32 checksum of the - dictionary chosen by the compressor and returns Z_NEED_DICT; otherwise - it sets strm->adler to the adler32 checksum of all output produced - so far (that is, total_out bytes) and returns Z_OK, Z_STREAM_END or - an error code as described below. At the end of the stream, inflate() - checks that its computed adler32 checksum is equal to that saved by the - compressor and returns Z_STREAM_END only if the checksum is correct. + In this implementation, inflate() always flushes as much output as + possible to the output buffer, and always uses the faster approach on the + first call. So the only effect of the flush parameter in this implementation + is on the return value of inflate(), as noted below, or when it returns early + because Z_BLOCK is used. + + If a preset dictionary is needed after this call (see inflateSetDictionary + below), inflate sets strm-adler to the adler32 checksum of the dictionary + chosen by the compressor and returns Z_NEED_DICT; otherwise it sets + strm->adler to the adler32 checksum of all output produced so far (that is, + total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described + below. At the end of the stream, inflate() checks that its computed adler32 + checksum is equal to that saved by the compressor and returns Z_STREAM_END + only if the checksum is correct. + + inflate() will decompress and check either zlib-wrapped or gzip-wrapped + deflate data. The header type is detected automatically. Any information + contained in the gzip header is not retained, so applications that need that + information should instead use raw inflate, see inflateInit2() below, or + inflateBack() and perform their own processing of the gzip header and + trailer. inflate() returns Z_OK if some progress has been made (more input processed or more output produced), Z_STREAM_END if the end of the compressed data has been reached and all uncompressed output has been produced, Z_NEED_DICT if a preset dictionary is needed at this point, Z_DATA_ERROR if the input data was - corrupted (input stream not conforming to the zlib format or incorrect - adler32 checksum), Z_STREAM_ERROR if the stream structure was inconsistent - (for example if next_in or next_out was NULL), Z_MEM_ERROR if there was not - enough memory, Z_BUF_ERROR if no progress is possible or if there was not - enough room in the output buffer when Z_FINISH is used. In the Z_DATA_ERROR - case, the application may then call inflateSync to look for a good - compression block. + corrupted (input stream not conforming to the zlib format or incorrect check + value), Z_STREAM_ERROR if the stream structure was inconsistent (for example + if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory, + Z_BUF_ERROR if no progress is possible or if there was not enough room in the + output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and + inflate() can be called again with more input and more output space to + continue decompressing. If Z_DATA_ERROR is returned, the application may then + call inflateSync() to look for a good compression block if a partial recovery + of the data is desired. */ @@ -397,7 +449,7 @@ ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm)); The following functions are needed only in some special applications. */ -/* +/* ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm, int level, int method, @@ -413,11 +465,21 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm, this version of the library. The windowBits parameter is the base two logarithm of the window size - (the size of the history buffer). It should be in the range 8..15 for this + (the size of the history buffer). It should be in the range 8..15 for this version of the library. Larger values of this parameter result in better compression at the expense of memory usage. The default value is 15 if deflateInit is used instead. + windowBits can also be -8..-15 for raw deflate. In this case, -windowBits + determines the window size. deflate() will then generate raw deflate data + with no zlib header or trailer, and will not compute an adler32 check value. + + windowBits can also be greater than 15 for optional gzip encoding. Add + 16 to windowBits to write a simple gzip header and trailer around the + compressed data instead of a zlib wrapper. The gzip header will have no + file name, no extra data, no comment, no modification time (set to zero), + no header crc, and the operating system will be set to 255 (unknown). + The memLevel parameter specifies how much memory should be allocated for the internal compression state. memLevel=1 uses minimum memory but is slow and reduces compression ratio; memLevel=9 uses maximum memory @@ -426,21 +488,23 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm, The strategy parameter is used to tune the compression algorithm. Use the value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a - filter (or predictor), or Z_HUFFMAN_ONLY to force Huffman encoding only (no - string match). Filtered data consists mostly of small values with a - somewhat random distribution. In this case, the compression algorithm is - tuned to compress them better. The effect of Z_FILTERED is to force more - Huffman coding and less string matching; it is somewhat intermediate - between Z_DEFAULT and Z_HUFFMAN_ONLY. The strategy parameter only affects - the compression ratio but not the correctness of the compressed output even - if it is not set appropriately. + filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no + string match), or Z_RLE to limit match distances to one (run-length + encoding). Filtered data consists mostly of small values with a somewhat + random distribution. In this case, the compression algorithm is tuned to + compress them better. The effect of Z_FILTERED is to force more Huffman + coding and less string matching; it is somewhat intermediate between + Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as + Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy + parameter only affects the compression ratio but not the correctness of the + compressed output even if it is not set appropriately. deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid method). msg is set to null if there is no error message. deflateInit2 does not perform any compression: this will be done by deflate(). */ - + ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm, const Bytef *dictionary, uInt dictLength)); @@ -464,11 +528,12 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm, deflate or deflate2. Thus the strings most likely to be useful should be put at the end of the dictionary, not at the front. - Upon return of this function, strm->adler is set to the Adler32 value + Upon return of this function, strm->adler is set to the adler32 value of the dictionary; the decompressor may later use this value to determine - which dictionary has been used by the compressor. (The Adler32 value + which dictionary has been used by the compressor. (The adler32 value applies to the whole dictionary even if only a subset of the dictionary is - actually used by the compressor.) + actually used by the compressor.) If a raw deflate was requested, then the + adler32 value is not computed and strm->adler is not set. deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a parameter is invalid (such as NULL dictionary) or the stream state is @@ -507,8 +572,8 @@ ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm)); */ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm, - int level, - int strategy)); + int level, + int strategy)); /* Dynamically update the compression level and compression strategy. The interpretation of level and strategy is as in deflateInit2. This can be @@ -527,7 +592,32 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm, if strm->avail_out was zero. */ -/* +ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm, + uLong sourceLen)); +/* + deflateBound() returns an upper bound on the compressed size after + deflation of sourceLen bytes. It must be called after deflateInit() + or deflateInit2(). This would be used to allocate an output buffer + for deflation in a single pass, and so would be called before deflate(). +*/ + +ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm, + int bits, + int value)); +/* + deflatePrime() inserts bits in the deflate output stream. The intent + is that this function is used to start off the deflate output with the + bits leftover from a previous deflate stream when appending to it. As such, + this function can only be used for raw deflate, and must be used before the + first deflate() call after a deflateInit2() or deflateReset(). bits must be + less than or equal to 16, and that many of the least significant bits of + value will be inserted in the output. + + deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +/* ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm, int windowBits)); @@ -538,11 +628,30 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm, The windowBits parameter is the base two logarithm of the maximum window size (the size of the history buffer). It should be in the range 8..15 for this version of the library. The default value is 15 if inflateInit is used - instead. If a compressed stream with a larger window size is given as - input, inflate() will return with the error code Z_DATA_ERROR instead of - trying to allocate a larger window. - - inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + instead. windowBits must be greater than or equal to the windowBits value + provided to deflateInit2() while compressing, or it must be equal to 15 if + deflateInit2() was not used. If a compressed stream with a larger window + size is given as input, inflate() will return with the error code + Z_DATA_ERROR instead of trying to allocate a larger window. + + windowBits can also be -8..-15 for raw inflate. In this case, -windowBits + determines the window size. inflate() will then process raw deflate data, + not looking for a zlib or gzip header, not generating a check value, and not + looking for any check values for comparison at the end of the stream. This + is for use with other formats that use the deflate compressed data format + such as zip. Those formats provide their own check values. If a custom + format is developed using the raw deflate format for compressed data, it is + recommended that a check value such as an adler32 or a crc32 be applied to + the uncompressed data as is done in the zlib, gzip, and zip formats. For + most applications, the zlib format should be used as is. Note that comments + above on the use in deflateInit2() applies to the magnitude of windowBits. + + windowBits can also be greater than 15 for optional gzip decoding. Add + 32 to windowBits to enable zlib and gzip decoding with automatic header + detection, or add 16 to decode only the gzip format (the zlib format will + return a Z_DATA_ERROR). + + inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough memory, Z_STREAM_ERROR if a parameter is invalid (such as a negative memLevel). msg is set to null if there is no error message. inflateInit2 does not perform any decompression apart from reading the zlib header if @@ -557,20 +666,20 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm, Initializes the decompression dictionary from the given uncompressed byte sequence. This function must be called immediately after a call of inflate if this call returned Z_NEED_DICT. The dictionary chosen by the compressor - can be determined from the Adler32 value returned by this call of + can be determined from the adler32 value returned by this call of inflate. The compressor and decompressor must use exactly the same dictionary (see deflateSetDictionary). inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a parameter is invalid (such as NULL dictionary) or the stream state is inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the - expected one (incorrect Adler32 value). inflateSetDictionary does not + expected one (incorrect adler32 value). inflateSetDictionary does not perform any decompression: this will be done by subsequent calls of inflate(). */ ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm)); -/* +/* Skips invalid compressed data until a full flush point (see above the description of deflate with Z_FULL_FLUSH) can be found, or until all available input is skipped. No output is provided. @@ -584,6 +693,22 @@ ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm)); until success or end of the input data. */ +ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest, + z_streamp source)); +/* + Sets the destination stream as a complete copy of the source stream. + + This function can be useful when randomly accessing a large stream. The + first pass through the stream can periodically record the inflate state, + allowing restarting inflate at those points when randomly accessing the + stream. + + inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_STREAM_ERROR if the source stream state was inconsistent + (such as zalloc being NULL). msg is left unchanged in both source and + destination. +*/ + ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm)); /* This function is equivalent to inflateEnd followed by inflateInit, @@ -594,6 +719,149 @@ ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm)); stream state was inconsistent (such as zalloc or state being NULL). */ +/* +ZEXTERN int ZEXPORT inflateBackInit OF((z_stream FAR *strm, int windowBits, + unsigned char FAR *window)); + + Initialize the internal stream state for decompression using inflateBack() + calls. The fields zalloc, zfree and opaque in strm must be initialized + before the call. If zalloc and zfree are Z_NULL, then the default library- + derived memory allocation routines are used. windowBits is the base two + logarithm of the window size, in the range 8..15. window is a caller + supplied buffer of that size. Except for special applications where it is + assured that deflate was used with small window sizes, windowBits must be 15 + and a 32K byte window must be supplied to be able to decompress general + deflate streams. + + See inflateBack() for the usage of these routines. + + inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of + the paramaters are invalid, Z_MEM_ERROR if the internal state could not + be allocated, or Z_VERSION_ERROR if the version of the library does not + match the version of the header file. +*/ + +typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *)); +typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned)); + +ZEXTERN int ZEXPORT inflateBack OF((z_stream FAR *strm, + in_func in, void FAR *in_desc, + out_func out, void FAR *out_desc)); +/* + inflateBack() does a raw inflate with a single call using a call-back + interface for input and output. This is more efficient than inflate() for + file i/o applications in that it avoids copying between the output and the + sliding window by simply making the window itself the output buffer. This + function trusts the application to not change the output buffer passed by + the output function, at least until inflateBack() returns. + + inflateBackInit() must be called first to allocate the internal state + and to initialize the state with the user-provided window buffer. + inflateBack() may then be used multiple times to inflate a complete, raw + deflate stream with each call. inflateBackEnd() is then called to free + the allocated state. + + A raw deflate stream is one with no zlib or gzip header or trailer. + This routine would normally be used in a utility that reads zip or gzip + files and writes out uncompressed files. The utility would decode the + header and process the trailer on its own, hence this routine expects + only the raw deflate stream to decompress. This is different from the + normal behavior of inflate(), which expects either a zlib or gzip header and + trailer around the deflate stream. + + inflateBack() uses two subroutines supplied by the caller that are then + called by inflateBack() for input and output. inflateBack() calls those + routines until it reads a complete deflate stream and writes out all of the + uncompressed data, or until it encounters an error. The function's + parameters and return types are defined above in the in_func and out_func + typedefs. inflateBack() will call in(in_desc, &buf) which should return the + number of bytes of provided input, and a pointer to that input in buf. If + there is no input available, in() must return zero--buf is ignored in that + case--and inflateBack() will return a buffer error. inflateBack() will call + out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out() + should return zero on success, or non-zero on failure. If out() returns + non-zero, inflateBack() will return with an error. Neither in() nor out() + are permitted to change the contents of the window provided to + inflateBackInit(), which is also the buffer that out() uses to write from. + The length written by out() will be at most the window size. Any non-zero + amount of input may be provided by in(). + + For convenience, inflateBack() can be provided input on the first call by + setting strm->next_in and strm->avail_in. If that input is exhausted, then + in() will be called. Therefore strm->next_in must be initialized before + calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called + immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in + must also be initialized, and then if strm->avail_in is not zero, input will + initially be taken from strm->next_in[0 .. strm->avail_in - 1]. + + The in_desc and out_desc parameters of inflateBack() is passed as the + first parameter of in() and out() respectively when they are called. These + descriptors can be optionally used to pass any information that the caller- + supplied in() and out() functions need to do their job. + + On return, inflateBack() will set strm->next_in and strm->avail_in to + pass back any unused input that was provided by the last in() call. The + return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR + if in() or out() returned an error, Z_DATA_ERROR if there was a format + error in the deflate stream (in which case strm->msg is set to indicate the + nature of the error), or Z_STREAM_ERROR if the stream was not properly + initialized. In the case of Z_BUF_ERROR, an input or output error can be + distinguished using strm->next_in which will be Z_NULL only if in() returned + an error. If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to + out() returning non-zero. (in() will always be called before out(), so + strm->next_in is assured to be defined if out() returns non-zero.) Note + that inflateBack() cannot return Z_OK. +*/ + +ZEXTERN int ZEXPORT inflateBackEnd OF((z_stream FAR *strm)); +/* + All memory allocated by inflateBackInit() is freed. + + inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream + state was inconsistent. +*/ + +ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void)); +/* Return flags indicating compile-time options. + + Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other: + 1.0: size of uInt + 3.2: size of uLong + 5.4: size of voidpf (pointer) + 7.6: size of z_off_t + + Compiler, assembler, and debug options: + 8: DEBUG + 9: ASMV or ASMINF -- use ASM code + 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention + 11: 0 (reserved) + + One-time table building (smaller code, but not thread-safe if true): + 12: BUILDFIXED -- build static block decoding tables when needed + 13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed + 14,15: 0 (reserved) + + Library content (indicates missing functionality): + 16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking + deflate code when not needed) + 17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect + and decode gzip streams (to avoid linking crc code) + 18-19: 0 (reserved) + + Operation variations (changes in library functionality): + 20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate + 21: FASTEST -- deflate algorithm with only one, lowest compression level + 22,23: 0 (reserved) + + The sprintf variant used by gzprintf (zero is best): + 24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format + 25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure! + 26: 0 = returns value, 1 = void -- 1 means inferred string length returned + + Remainder: + 27-31: 0 (reserved) + */ + /* utility functions */ @@ -610,8 +878,8 @@ ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen, /* Compresses the source buffer into the destination buffer. sourceLen is the byte length of the source buffer. Upon entry, destLen is the total - size of the destination buffer, which must be at least 0.1% larger than - sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the + size of the destination buffer, which must be at least the value returned + by compressBound(sourceLen). Upon exit, destLen is the actual size of the compressed buffer. This function can be used to compress a whole file at once if the input file is mmap'ed. @@ -627,14 +895,22 @@ ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen, Compresses the source buffer into the destination buffer. The level parameter has the same meaning as in deflateInit. sourceLen is the byte length of the source buffer. Upon entry, destLen is the total size of the - destination buffer, which must be at least 0.1% larger than sourceLen plus - 12 bytes. Upon exit, destLen is the actual size of the compressed buffer. + destination buffer, which must be at least the value returned by + compressBound(sourceLen). Upon exit, destLen is the actual size of the + compressed buffer. compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR if there was not enough room in the output buffer, Z_STREAM_ERROR if the level parameter is invalid. */ +ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen)); +/* + compressBound() returns an upper bound on the compressed size after + compress() or compress2() on sourceLen bytes. It would be used before + a compress() or compress2() call to allocate the destination buffer. +*/ + ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen)); /* @@ -650,7 +926,7 @@ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, uncompress returns Z_OK if success, Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR if there was not enough room in the output - buffer, or Z_DATA_ERROR if the input data was corrupted. + buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete. */ @@ -661,8 +937,9 @@ ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode)); Opens a gzip (.gz) file for reading or writing. The mode parameter is as in fopen ("rb" or "wb") but can also include a compression level ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for - Huffman only compression as in "wb1h". (See the description - of deflateInit2 for more information about the strategy parameter.) + Huffman only compression as in "wb1h", or 'R' for run-length encoding + as in "wb1R". (See the description of deflateInit2 for more information + about the strategy parameter.) gzopen can be used to read a file which is not in gzip format; in this case gzread will directly read from the file without decompression. @@ -701,8 +978,8 @@ ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); gzread returns the number of uncompressed bytes actually read (0 for end of file, -1 for error). */ -ZEXTERN int ZEXPORT gzwrite OF((gzFile file, - const voidp buf, unsigned len)); +ZEXTERN int ZEXPORT gzwrite OF((gzFile file, + voidpc buf, unsigned len)); /* Writes the given number of uncompressed bytes into the compressed file. gzwrite returns the number of uncompressed bytes actually written @@ -713,7 +990,13 @@ ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...)); /* Converts, formats, and writes the args to the compressed file under control of the format string, as in fprintf. gzprintf returns the number of - uncompressed bytes actually written (0 in case of error). + uncompressed bytes actually written (0 in case of error). The number of + uncompressed bytes written is limited to 4095. The caller should assure that + this limit is not exceeded. If it is exceeded, then gzprintf() will return + return an error (0) with nothing written. In this case, there may also be a + buffer overflow with unpredictable consequences, which is possible only if + zlib was compiled with the insecure functions sprintf() or vsprintf() + because the secure snprintf() or vsnprintf() functions were not available. */ ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s)); @@ -744,6 +1027,16 @@ ZEXTERN int ZEXPORT gzgetc OF((gzFile file)); or -1 in case of end of file or error. */ +ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file)); +/* + Push one character back onto the stream to be read again later. + Only one character of push-back is allowed. gzungetc() returns the + character pushed, or -1 on failure. gzungetc() will fail if a + character has been pushed but not read yet, or if c is -1. The pushed + character will be discarded if the stream is repositioned with gzseek() + or gzrewind(). +*/ + ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush)); /* Flushes all pending output into the compressed file. The parameter @@ -755,8 +1048,8 @@ ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush)); */ ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file, - z_off_t offset, int whence)); -/* + z_off_t offset, int whence)); +/* Sets the starting position for the next gzread or gzwrite on the given compressed file. The offset represents a number of bytes in the uncompressed data stream. The whence parameter is defined as in lseek(2); @@ -810,6 +1103,13 @@ ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum)); to get the exact error code. */ +ZEXTERN void ZEXPORT gzclearerr OF((gzFile file)); +/* + Clears the error and end-of-file flags for file. This is analogous to the + clearerr() function in stdio. This is useful for continuing to read a gzip + file that is being written concurrently. +*/ + /* checksum functions */ /* @@ -867,6 +1167,10 @@ ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method, int stream_size)); ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits, const char *version, int stream_size)); +ZEXTERN int ZEXPORT inflateBackInit_ OF((z_stream FAR *strm, int windowBits, + unsigned char FAR *window, + const char *version, + int stream_size)); #define deflateInit(strm, level) \ deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream)) #define inflateInit(strm) \ @@ -876,9 +1180,12 @@ ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits, (strategy), ZLIB_VERSION, sizeof(z_stream)) #define inflateInit2(strm, windowBits) \ inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream)) +#define inflateBackInit(strm, windowBits, window) \ + inflateBackInit_((strm), (windowBits), (window), \ + ZLIB_VERSION, sizeof(z_stream)) -#if !defined(_Z_UTIL_H) && !defined(NO_DUMMY_DECL) +#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL) struct internal_state {int dummy;}; /* hack for buggy compilers */ #endif @@ -890,4 +1197,4 @@ ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void)); } #endif -#endif /* _ZLIB_H */ +#endif /* ZLIB_H */ |
